Ring expansion of 4,4-diethyl-1,2-dithiolane in the reaction with butylacetylene. Involvement of anion and radical intermediates
作者:D. V. Demchuk、G. I. Nikishin
DOI:10.1007/bf02495375
日期:1997.1
The action of lithium butyl acetylenide in THF causes 4,4-diethyl-1,2-dithiolane to undergo ring-opening to form 2,2-diethyl-4-thia-5-decyne-1-thiol, which cyclizes to give 2-butyl-6,6-diethyl-5,6-dihydro-1,4-dithiepin by either a homolytic or a nucleophilic mechanism.
丁基乙炔锂在 THF 中的作用导致 4,4-diethyl-1,2-dithiolane 开环形成 2,2-diethyl-4-thia-5-decyne-1-thiol,再环化生成 2 -丁基-6,6-diethyl-5,6-dihydro-1,4-dithiepin 通过均裂或亲核机制。