Design and synthesis of a hybrid framework of indanone and chromane: total synthesis of a homoisoflavanoid, brazilane

Org Biomol Chem. 2017 Dec 19;16(1):89-100. doi: 10.1039/c7ob02758c.

Abstract

A chemical backbone of tetracyclic homoisoflavanoid natural products such as brazilin inspired us to design a new chemical scaffold, 6a,11b-dihydroindeno[2,1-c]chromen-7(6H)-one, which is a hybrid structure of indanone and chromane. Pd-catalyzed Suzuki-Miyaura cross-coupling of 4-chloro-2H-chromene-3-carbaldehydes with (hetero)aryl boronic acids was employed as a means to introduce a wide variety of (hetero)aryl groups as the D ring and intramolecular Friedel-Crafts acylation was utilized to construct the C ring of this skeleton. Total synthesis of the natural product, brazilane, was also demonstrated via this new chemical framework.

MeSH terms

  • Biological Products / chemical synthesis*
  • Biological Products / chemistry
  • Chromans / chemistry*
  • Drug Design*
  • Flavonoids / chemical synthesis*
  • Flavonoids / chemistry
  • Indans / chemistry*
  • Isoflavones / chemical synthesis*
  • Isoflavones / chemistry
  • Molecular Structure

Substances

  • Biological Products
  • Chromans
  • Flavonoids
  • Indans
  • Isoflavones
  • brazilane
  • indacrinone