Sulfur-Based Activating Groups Sulfur-Ylides Sulfur-Stabilized Carbanions: Structure Sulfone-Based Transformations Pummerer Rearrangement

Krista Beaver Synthetic Applications of α-Diazocarbonyl Derivatives Chem 206 Synthetic Applications of α-Diazocarbonyl Compounds An Evans Group Afternoon Seminar Krista Beaver January 15, 1999 Leading References:

An Organizational Format for the Classification of Functional Groups. Applications to the Construction of Difunctional Relationships

Nitro and Diazo Groups Historical Perspective Charge Affinity Patterns Functional Group Classification Scheme The Chemistry of the –NO2 Group

Leading References: Langer, P. Angew. Chem. Int. Ed. Engl. 2000, 39, 3049-3052. Ciganek, E. Org. React. 1997, 51, 201-350. Basavaiah, D.; et. al. Tetrahedron, 1996, 52, 8001-8062. Drewes, S. E.; Roos, G. H. P. Tetrahedron, 1988, 44, 4653-4670

Double Stereodifferentiating Aldol Reactions The Mukaiyama Aldol Reaction Variant Allylmetal Nucleophiles as Enolate Synthons

Other Useful References Polyketide Biosynthesis Historical Perspective on the Aldol Reaction Aldol Diastereoselectivity Enolate Diastereoface Selectivity Absolute Control in the Aldol Process

Relevant Background Reading Chemistry 206 Advanced Organic Chemistry Lecture Number 28 Ambiphilic Functional Groups–3

D. Seebach Angew. Chem. Int. Ed. Engl., 27, 1624 (1983). (handout) \Stereoselective Alkylation Reactions of Chiral Metal Enolates\. D. A. Evans Asymmetric Synthesis, 3, 1 (1984). (handout)

一、解释题 1化合物(1)和(2)进行Sx1水解时其反应速率如所示,请解释