carbonyl‐stabilised ammoniumylide‐mediated epoxidation reactions were systematically investigated by experimental and computational means and the hereby obtained energy profiles provide explanations for the observed experimental results. In addition, we were able to identify the first tertiary amine‐based chiral auxiliary that allows for high enantioselectivities and high yields for such epoxidation reactions.
Ammonium ylides for the diastereoselective synthesis of glycidic amides
作者:Mario Waser、Richard Herchl、Norbert Müller
DOI:10.1039/c0cc04821f
日期:——
A highly trans-selective protocol for the synthesis of glycidic amides was developed. This approach gave access to oxiranes by reacting stabilised ammonium ylides bearing an alpha-carbonyl group and aromatic aldehydes in moderate to good yields.
Catalytic sulfur ylide reactions: Use of diazoacetamides for the diastereoselective synthesis of glycidic amides
作者:Varinder K. Aggarwal、Paul Blackburn、Robin Fieldhouse、Ray V.H. Jones
DOI:10.1016/s0040-4039(98)01852-8
日期:1998.11
Diazoacetamides react with aldehydes in the presence of catalytic quantities of Cu(acac)(2) (5 mol%) and tetrahydrothiophene (20 mol%) to give glycidic amides in good yields and high diastereoselectivity. (C) 1998 Elsevier Science Ltd. All rights reserved.