作者:Douglass F. Taber、Han Yu
DOI:10.1021/jo961780q
日期:1997.3.1
Significant 1,3-induction in intramolecular alkylidene C-H insertion is reported. Thus, exposure of ketone I to the lithium salt of (trimethylsilyl)diazomethane provides a 2.4:1.0 ratio of IIa and IIIa, which are deprotected to alpha-necrodol IIb and the epimeric IIIb. The 1,3-insertion product cyclopropene IV was also formed.