Gold Catalysis: Mild Conditions for the Transformation of Alkynyl Epoxides to Furans
作者:A. Stephen K. Hashmi、Pradipta Sinha
DOI:10.1002/adsc.200303201
日期:2004.3
Gold(III) chloride catalyzes the isomerization of alkynylepoxides to furans under mildconditions. Additional functional groups like hydroxy groups or aryl bromides do not need to be protected.
Preparation of 2-Iodo Allylic Alcohols from 2-Butyn-1,4-diol
作者:Douglass F. Taber、M. Inthikhab Sikkander、James F. Berry、Kevin J. Frankowski
DOI:10.1021/jo7021197
日期:2008.2.1
The conversion of 2-butyn-1,4-diol to (Z)-2,4-diiodobut-2-en-1-ol proceeded efficiently using in situ generated trimethylsilyl iodide. Coupling with Grignard reagents and other nucleophiles delivered (2Z)-2-iodo allylicalcohols. The geometry of the products was established by nOe.
Convenient Synthetic Route to an Enantiomerically Pure FMOC α-Amino Acid
作者:Douglass F. Taber、James F. Berry、Timothy J. Martin
DOI:10.1021/jo801781v
日期:2008.12.5
A strategy for the facile alpha-amination of carboxylic acid menthyl esters is described. The resulting diastereomers, readily separable, can be individually carried on to each enantiomer of the FMOC alpha-amino acid. A variety of unnatural side chains were compatible with this approach. The menthyl ester was easily removed from the FMOC alpha-amino acid without racermization.