Ring-opening reactions of cyclopropanes. Part 7.1 Selenenylation and cyanoselenenylation of ethyl 2,2-dimethoxycyclopropanecarboxylates
作者:M. Liliana Graziano、M. Rosaria Iesce、Flavio Cermola、Giovanni Caputo、Fulvio De Lorenzo
DOI:10.1039/b109480g
日期:2002.2.22
1a. The presence of TiCl4 influences the stereochemistry of the reaction with chloride 3 while it is essential for reaction of the less reactive PhSeCN 4. With this electrophile the reactions lead to α,α-dimethoxycarbonitriles 13a–d while only 1a and 1b give also the expected cyanoselenenyl derivatives 12a and 12b. Moreover, from 1b compound syn- 5b is obtained, and 1a gives, via the alkene 2a, esters