Diene-Transmissive Diels-Alder Sequences with Benzynes

Org Lett. 2019 Sep 20;21(18):7529-7533. doi: 10.1021/acs.orglett.9b02807. Epub 2019 Sep 3.

Abstract

Diene-transmissive Diels-Alder (DTDA) sequences are extraordinarily powerful processes for the generation of fused bicyclic systems. Nonetheless, only stable dienophiles have previously been deployed. Herein we report DTDA sequences with a variety of substituted [3]dendralenes in the first study to deploy arynes as dienophiles. We demonstrate the one-flask generation of complex, aromatic-ring-containing, multicyclic systems of relevance to medicinal chemistry. These synthetic operations provide numerous successful examples of the otherwise challenging and rarely reported intermolecular Diels-Alder reaction of acyclic 1,3-butadienes with arynes, which is made possible due to the exalted reactivity of dendralenic dienes.

Publication types

  • Research Support, Non-U.S. Gov't