Matched Coupling of Propargylic Carbonates with Cyclopropanols

Org Lett. 2018 Feb 2;20(3):554-557. doi: 10.1021/acs.orglett.7b03637. Epub 2018 Jan 18.

Abstract

The ring opening-coupling reaction of cyclopropanols with propargylic carbonates affording synthetically attractive allenyl ketones has been developed. The mechanism involves the ligand-exchange reaction of in situ formed allenyl palladium methoxide with cyclopropanols followed by carbon-carbon bond cleavage and reductive elimination. The reactions proceeded smoothly under mild reaction conditions with Pd(0)/XPhos catalysis in the absence of any external base and displayed a wide scope and application to a steroidal skeleton. The efficiency of chirality transfer and synthetic utility of the allene products have also been demonstrated.

Publication types

  • Research Support, Non-U.S. Gov't