作者:García-Martínez, Patricia、López, Luis A.
DOI:10.1021/acs.orglett.4c01468
日期:——
The gold-catalyzed reaction of 2-en-4-ynones with alkynylsilanes provides fully substituted allene derivatives bearing furyl and silyl groups. This transformation would involve generation of a gold furyl carbene intermediate, which regioselectively undergoes a nucleophilic attack by the alkynylsilane at the electrophilic carbene carbon atom with the formation of a β-gold vinyl cation species. The subsequent
2-en-4-炔酮与炔基硅烷的金催化反应提供带有呋喃基和甲硅烷基的完全取代的丙二烯衍生物。这种转化将涉及金呋喃基卡宾中间体的生成,该中间体区域选择性地经历炔基硅烷对亲电子卡宾碳原子的亲核攻击,形成β-金乙烯基阳离子物质。随后金催化剂的释放,伴随着 1,2-甲硅烷基转移,导致四取代丙二烯产物的形成。