(S,S)-N,N-Bis(alpha-methylbenzyl)formamide in combination with HMPA catalyzes the allenylation of aliphatic aldehydes with propargyltrichlorosilane with good enantioselectivity (up to 95% e.e.). (C) 1998 Elsevier Science Ltd. All rights reserved.
An In-Mediated Tandem Reaction of Aldehydes with 3-Bromo-1-propyne To Produce 1-Substituted-3-methylene-5-yn-1-ol Compounds