Highly Functionalized Selenocyclopropanes From 1-Halo-1-Chalcogeno Alkenes
摘要:
Dicloro and dibromo carbenes, generated under phase transfer conditions, add to 1-halo-1-chalcogeno alkenes, to give highly functionalized selenocyclopropanes in good yields.
Stereoselective synthesis of (E)-1-iodo-1-selenoalkenes via hydroalumination–iodination of 1-alkynyl selenides
作者:Carlos Pérez-Balado、Fabio Lucaccioni、István E. Markó
DOI:10.1016/j.tetlet.2005.05.052
日期:2005.7
syn-Hydroalumination of 2,4,6-triisopropylphenylselanyl-1-alkynes 22 with DIBAL-H, followed by AN exchange with I-2, afforded selectively the corresponding (E)-1-iodo-1-selenoalkenes in good yields. The sterically hindered 2,4,6-triisopropylphenyl group proved to be mandatory and prevented the formation of undesired by-products. (c) 2005 Elsevier Ltd. All rights reserved.