Stereoconvergent ‘one-pot’ tandem [2,3]-Wittig-anionic oxy-Cope rearrangement of acyclic bis-allylic ethers in the diastereoselective synthesis of substituted tetrahydropyrans
The kinetic resolution of allylic alcohols by a non-enzymatic acylation catalyst; application to natural product synthesis
作者:Stéphane Bellemin-Laponnaz、Jennifer Tweddell、J. Craig Ruble、Frank M. Breitling、Gregory C. Fu
DOI:10.1039/b002041i
日期:——
A planar-chiral DMAP derivative is shown to serve as an effective catalyst for the kinetic resolution of allylic alcohols; to illustrate its practical utility, the catalyst is applied to the resolution of two alcohols that have been employed as intermediates in recent naturalproduct total syntheses.
Stereoselective Dichlorination of Allylic Alcohol Derivatives to Access Key Stereochemical Arrays of the Chlorosulfolipids
作者:Grant M. Shibuya、Jacob S. Kanady、Christopher D. Vanderwal
DOI:10.1021/ja804167v
日期:2008.9.17
Dichlorination of (Z)-allylic trichloroacetates efficiently and stereoselectively generates the syn,syn hydroxydichloride stereotriad that is prevalent in the understudied polychlorinated sulfolipid class of natural products. Further, the dichlorination of a (Z)-allylic chlorohydrin affords with high selectivity a stereotetrad present in one of the chlorosulfolipids.
Convenient in situ generation of various dichlorinating agents from oxone and chloride: diastereoselective dichlorination of allylic and homoallylic alcohol derivatives
作者:Jingyun Ren、Rongbiao Tong
DOI:10.1039/c3ob40670a
日期:——
A safe and convenient protocol was developed for in situ generation of various dichlorinating agents (cf. Cl2, NCl3, Et4NCl3, ArICl2) from oxone and chloride. The synthetic utility of this protocol was demonstrated by diastereoselective dichlorination of a series of allylic and homoallylicalcohol derivatives with excellent yields and diastereoselectivity.