课程介绍 Course Introduction
学分：4 | 先修课：普通化学 | 学期：第二学期
本课程系统讲授碳化合物的结构、性质、反应及其机理。内容涵盖烷烃、烯烃、炔烃、芳香烃、卤代烃、醇酚醚、醛酮醌、羧酸及其衍生物、胺类等主要有机化合物的命名、结构与反应。重点讲解取代反应、消除反应、加成反应、重排反应等基本反应类型及其机理，介绍立体化学、波谱分析等重要概念，为生物化学专业学习奠定有机化学基础。
This course systematically covers the structure, properties, reactions, and mechanisms of carbon compounds. Topics include alkanes, alkenes, alkynes, aromatic hydrocarbons, alkyl halides, alcohols, phenols, ethers, aldehydes, ketones, quinones, carboxylic acids and derivatives, and amines. Emphasis is placed on substitution, elimination, addition, and rearrangement reaction mechanisms, stereochemistry, and spectroscopic analysis, providing essential organic chemistry foundations for biochemistry studies.
Steps
Step 1
Target Molecule Selection and Synthetic Route Design
The core task of this step is to select a target organic molecule with appropriate complexity and design a rational synthetic route. It requires comprehensive consideration of structural features, reaction feasibility, raw material availability, and synthetic efficiency using retrosynthetic analysis.
• Choose target molecule from pharmaceuticals, natural products, or functional dyes (aspirin, acetaminophen, ethyl benzoate, hesperetin); analyze functional groups and chiral centers; determine difficulty
• Perform retrosynthetic analysis: use disconnection approach to break target into reasonable precursors; identify key steps and construction order; compare advantages/disadvantages of different routes
• Finalize synthetic route: list reactants, reagents, solvents, conditions (temperature, time, catalyst), and expected yield for each step; draw complete synthetic scheme
Deliverable: Synthetic route design report (target structure analysis, retrosynthetic analysis, multi-route comparison, final route scheme, reaction conditions table) | Quality standard: Clear retrosynthetic logic, feasible and reasonable route, appropriate reaction selection, realistic yield expectations
Step 2
Reaction Mechanism Analysis and Stereochemistry Prediction
The core task of this step is to deeply analyze the mechanism of each reaction in the synthetic route and predict stereochemical outcomes and regioselectivity. Reaction mechanism is the core of organic chemistry; understanding electron pushing enables prediction of products and selectivity.
• Draw mechanism for each reaction: use curved arrows for electron transfer; label structures and stability of intermediates (carbocations, carbanions, radicals, transition states); explain driving force
• Analyze stereochemistry: predict chiral center configurations (R/S), cis-trans isomerism (E/Z), enantioselectivity and diastereoselectivity; assign using Cahn-Ingold-Prelog rules
• Study regioselectivity: analyze substituent directing effects (ortho/para directors, meta directors), Markovnikov's rule, Zaitsev's rule; explain why a specific regioisomer is major product
Deliverable: Reaction mechanism analysis report (mechanism diagrams for each step, intermediate structures, electron pushing analysis), stereochemistry prediction table, regioselectivity analysis | Quality standard: Accurate and in-depth mechanism analysis, correct electron pushing, reasonable stereochemistry prediction, standard terminology
Step 3
Spectral Feature Analysis and Structure Characterization Plan
The core task of this step is to predict spectral features (NMR, IR, MS, UV) of the target molecule and all intermediates, and design a structure characterization plan. Spectral interpretation is an essential tool for organic chemists to identify compound structures.
• Proton NMR prediction: calculate chemical shifts (using empirical formulas like Shoolery's rule, Curphy-Morrison parameters), integration areas, coupling splitting (n+1 rule, coupling constants); draw simulated spectrum; assign each peak
• IR prediction: identify characteristic functional group absorption peaks (carbonyl, hydroxyl, double bond, benzene ring, etc.); indicate wavenumber range and intensity; analyze effects of intra/intermolecular hydrogen bonding on peak shape
• Mass spectrometry analysis: predict molecular ion peak (M⁺), isotope patterns (Cl, Br, S), major fragment ion peaks and fragmentation pathways (α-cleavage, β-cleavage, McLafferty rearrangement, etc.)
Deliverable: Spectral analysis report (¹H NMR prediction table, IR characteristic peak table, MS fragmentation pathways, structure characterization flow chart) | Quality standard: Chemical shift prediction error <0.5ppm, accurate characteristic peak identification, reasonable fragmentation pathways
Step 4
Experimental Procedure Design and Purification Method Development
The core task of this step is to design detailed experimental procedures and product purification methods to ensure safe and efficient synthesis. The experimental plan should consider reagent addition order, temperature control, reaction monitoring methods (TLC, GC, HPLC), and purification strategies.
• Design experimental procedures: detail operational workflow for each reaction (addition order, addition rate, temperature control, stirring speed, reaction time); design reaction monitoring plan (TLC solvent system, visualization method, monitoring time points)
• Design product purification plan: select purification method based on product physical state (solid/liquid) and polarity (recrystallization solvent selection, vacuum distillation parameters, column chromatography eluent system); estimate purification yield
• Develop safety plan: identify hazardous chemicals (flammable, explosive, toxic, corrosive) at each step; list personal protective equipment (PPE), emergency response measures, and waste disposal methods
Deliverable: Experimental operation manual (detailed procedures for each step), purification plan (method selection rationale, operation flow), safety risk assessment table | Quality standard: Detailed and executable procedures, reasonable purification methods, comprehensive safety risk identification
Step 5
Synthesis Report Writing and Discussion
The core task of this step is to write a comprehensive organic synthesis report presenting retrosynthetic analysis, reaction mechanisms, spectral features, experimental plans, and safety assessment. The report should demonstrate theoretical depth and practical capability in organic chemistry.
• Write synthesis report following academic standards: abstract, introduction, retrosynthetic analysis, reaction mechanism discussion, spectral analysis, experimental procedures, safety and environmental protection, references; minimum 3000 words
• Create high-quality chemical structures: use ChemDraw to draw molecular structures, reaction schemes, mechanism diagrams, synthetic routes; clear and standard figure captions; accurate stereochemistry representation
• In-depth discussion: evaluate synthetic route efficiency (overall yield, step economy, atom economy); compare advantages/disadvantages of different strategies; discuss green chemistry improvements; outlook on target molecule applications
Deliverable: Complete organic synthesis report (PDF format), ChemDraw structure files, reference list | Quality standard: Complete structure, in-depth mechanism analysis, accurate spectral prediction, feasible experimental plan, professional and standard
Steps
Step 1
Target Molecule Selection and Synthetic Route Design
The core task of this step is to select a target organic molecule with appropriate complexity and design a rational synthetic route. It requires comprehensive consideration of structural features, reaction feasibility, raw material availability, and synthetic efficiency. Using retrosynthetic analysis, the target molecule is systematically disconnected into simple starting materials. Synthetic route design demonstrates organic chemistry logic and creativity.
• Choose target molecule from pharmaceuticals, natural products, or functional dyes (e.g., aspirin, acetaminophen, ethyl benzoate, hesperetin); analyze functional groups and chiral centers; determine synthetic difficulty
• Perform retrosynthetic analysis: use disconnection approach to break target molecule into reasonable precursors; identify key reaction steps and construction order; compare advantages/disadvantages of different routes (yield, cost, safety, step count)
• Finalize synthetic route: list reactants, reagents, solvents, reaction conditions (temperature, time, catalyst), and expected yield for each step; draw complete synthetic scheme
Deliverable: Synthetic route design report (target structure analysis, retrosynthetic analysis, multi-route comparison, final route scheme, reaction conditions table) | Quality standard: Clear retrosynthetic logic, feasible and reasonable route, appropriate reaction selection, realistic yield expectations
Step 2
Reaction Mechanism Analysis and Stereochemistry Prediction
The core task of this step is to deeply analyze the mechanism of each reaction in the synthetic route and predict stereochemical outcomes and regioselectivity. Reaction mechanism is the core of organic chemistry; understanding electron pushing enables prediction of products and selectivity. Concepts like frontier orbital theory and stereoelectronic effects are used to analyze reactivity and selectivity.
• Draw mechanism for each reaction: use curved arrows to show electron transfer; label structures and stability of intermediates (carbocations, carbanions, radicals, transition states); explain reaction driving force
• Analyze stereochemistry: predict configurations of chiral centers (R/S), cis-trans isomerism (E/Z), enantioselectivity and diastereoselectivity; assign chiral centers using Cahn-Ingold-Prelog rules
• Study regioselectivity: analyze substituent directing effects (ortho/para directors, meta directors), Markovnikov's rule, Zaitsev's rule, etc.; explain why a specific regioisomer is the major product
Deliverable: Reaction mechanism analysis report (mechanism diagrams for each step, intermediate structures, electron pushing analysis), stereochemistry prediction table, regioselectivity analysis | Quality standard: Accurate and in-depth mechanism analysis, correct electron pushing, reasonable stereochemistry prediction, standard terminology
Step 3
Spectral Feature Analysis and Structure Characterization Plan
The core task of this step is to predict spectral features (NMR, IR, MS, UV) of the target molecule and all intermediates, and design a structure characterization plan. Spectral interpretation is an essential tool for organic chemists to identify compound structures. The ability to predict spectra demonstrates deep understanding of structure-spectra relationships. Multiple spectroscopic techniques should be used for mutual validation.
• Proton NMR (¹H NMR) prediction: calculate chemical shifts (using empirical formulas like Shoolery's rule, Curphy-Morrison parameters), integration areas, coupling splitting (n+1 rule, coupling constants); draw simulated spectrum; assign each peak
• Infrared spectroscopy (IR) prediction: identify characteristic functional group absorption peaks (carbonyl, hydroxyl, double bond, benzene ring, etc.); indicate wavenumber range and intensity; analyze effects of intra/intermolecular hydrogen bonding on peak shape
• Mass spectrometry (MS) analysis: predict molecular ion peak (M⁺), isotope patterns (Cl, Br, S), major fragment ion peaks and fragmentation pathways (α-cleavage, β-cleavage, McLafferty rearrangement, etc.)
Deliverable: Spectral analysis report (¹H NMR prediction table, IR characteristic peak table, MS fragmentation pathways, structure characterization flow chart) | Quality standard: Chemical shift prediction error <0.5ppm, accurate characteristic peak identification, reasonable fragmentation pathways
Step 4
Experimental Procedure Design and Purification Method Development
The core task of this step is to design detailed experimental procedures and product purification methods to ensure safe and efficient synthesis. The experimental plan should consider reagent addition order, temperature control, reaction monitoring methods (TLC, GC, HPLC), and product purification strategies (distillation, recrystallization, extraction, column chromatography). Safety is paramount in organic chemistry experiments.
• Design experimental procedures: detail operational workflow for each reaction (addition order, addition rate, temperature control, stirring speed, reaction time); design reaction monitoring plan (TLC solvent system selection, visualization method, monitoring time points)
• Design product purification plan: select purification method based on product physical state (solid/liquid) and polarity (recrystallization solvent selection, vacuum distillation parameters, column chromatography eluent system); estimate purification yield
• Develop safety plan: identify hazardous chemicals (flammable, explosive, toxic, corrosive) at each step; list personal protective equipment (PPE), emergency response measures, and waste disposal methods
Deliverable: Experimental operation manual (detailed procedures for each step), purification plan (method selection rationale, operation flow), safety risk assessment table | Quality standard: Detailed and executable procedures, reasonable purification methods, comprehensive safety risk identification
Step 5
Synthesis Report Writing and Discussion
The core task of this step is to write a comprehensive organic synthesis report presenting retrosynthetic analysis, reaction mechanisms, spectral features, experimental plans, and safety assessment. The report should demonstrate theoretical depth and practical capability in organic chemistry, discuss advantages/disadvantages of the route and improvement directions, as well as application value of the target molecule.
• Write synthesis report following academic standards: abstract, introduction, retrosynthetic analysis, reaction mechanism discussion, spectral analysis, experimental procedures, safety and environmental protection, references; minimum 3000 words
• Create high-quality chemical structures: use ChemDraw or similar software to draw molecular structures, reaction schemes, mechanism diagrams, synthetic routes; clear and规范 figure captions; accurate stereochemistry representation
• In-depth discussion: evaluate synthetic route efficiency (overall yield, step economy, atom economy); compare advantages/disadvantages of different strategies; discuss green chemistry improvements; outlook on target molecule applications
Deliverable: Complete organic synthesis report (PDF format), ChemDraw structure files, reference list | Quality standard: Complete structure, in-depth mechanism analysis, accurate spectral prediction, feasible experimental plan, professional and standard
Steps
Step 1
Target Selection
Select target molecule and analyze structure
Deliverable: Structure Analysis
Step 2
Synthesis Design
Design routes via retrosynthetic analysis
Deliverable: Synthesis Routes
Step 3
Mechanism Analysis
Analyze mechanism, stereochemistry, and selectivity
Deliverable: Mechanism Diagrams
Step 4
Spectral Prediction
Predict IR, NMR, and MS spectral features
Deliverable: Spectral Predictions
Step 5
Report Writing
Compile synthesis plan and mechanism analysis
Deliverable: Analysis Report