Unambiguous determination of the stereochemistry of methylcopper and lithium tetranydridoaluminate-induced allene formation in the steroid series. A revision of literature data

Abstract

The structure of the allene obtained from mestranol methane sulphinate and methlycopper has been determinde by X-ray analysis; the allene turns out to be the 21α-Me compound, and not the erroneously reported 21β-Me epimer.