organocatalytic Cope rearrangement is reported. Acyclic and cyclic acyl hydrazides catalyze the rearrangement of 1,5‐hexadiene‐2‐carboxaldehydes via iminium ion formation. A correlation between ring size and catalyst activity was observed for the cyclic hydrazides, with seven‐ and eight‐membered‐ring catalysts being the most active. Diazepane carboxylate 5 c (10 mol %) catalyzed the rearrangement of a range
PROCESS FOR CONVERTING AN ALCOHOL TO THE CORRESPONDING FLUORIDE
申请人:3M Innovative Properties Company
公开号:EP1131270A1
公开(公告)日:2001-09-12
US6248889B1
申请人:——
公开号:US6248889B1
公开(公告)日:2001-06-19
[EN] PROCESS FOR CONVERTING AN ALCOHOL TO THE CORRESPONDING FLUORIDE<br/>[FR] PROCEDE DE CONVERSION D'UN ALCOOL EN FLUORURE CORRESPONDANT
申请人:3M INNOVATIVE PROPERTIES CO
公开号:WO2000031003A1
公开(公告)日:2000-06-02
A process for preparing a fluoride from its corresponding alcohol comprises the steps of (a) forming a mixture comprising (i) at least one fluorinated, saturated aliphatic or alicyclic sulfonyl fluoride (for example, perfluorobutanesulfonyl fluoride) and (ii) at least one primary or secondary alcohol; and (b) adding a molar excess of at least one strong, aprotic, non-nucleophilic, hindered, double bond-containing, organic base (for example, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)) to the mixture. The process is cost effective and provides excellent yields under variable reaction conditions.