Thexylborane-A Highly Versatile Reagent for Organic Synthesis via Hydroboration
作者:Ei-ichi NEGISHI、Herbert C. BROWN
DOI:10.1055/s-1974-23248
日期:——
The present review discusses the chemistry of thexylborane pertinent to organic synthesis, and summarizes scattered results of organic synthesis involving thexylborane. 1.Chemistry of Thexylborane 1.1. Preparation and Characterization of Thexylborane 1.2. Reaction of Thexylborane with Olefins 2. Synthetic Applications of Thexylborane 2.1. Synthesis of Unsymmetrical Ketones - A Multi-Carbon Homologation of Olefins 2.2. Synthesis of Cyclic Ketones - A New Annelation Reaction 2.3. Coupling of Two Unlike Alkyl Groups via Bromination of Thexyldialkylboranes 2.4. Synthesis of trans-Disubstituted Olefins 2.5. Syntheses of Conjugated Dienes 2.6. Stereoselective Syntheses of Diols from Dienes 2.7. Synthesis of 1,5-Diols from Monoolefins 2.8. Synthesis of Monoalkylboranes as Triethylaminates 2.9. Selective Reduction with Thexylborane 2.10.Selective Reduction with Trialkylborohydrides Containing the Thexyl Group
Use of Optically Active Cyclic <i>N</i>,<i>N</i>-Dialkyl Aminals in Asymmetric Induction
作者:Michael E. Jung、Adrian Huang
DOI:10.1021/ol0001517
日期:2000.8.1
[reaction: see text]Cyclization of the opticallyactive ketone N,N-dialkyl aminals A affords the diastereomer B as the major product with diastereoselectivities ranging from nearly 1:1 to essentially 100:0 depending on the cyclization studied.