A Highly Enantioselective Conjugate Reduction of 3-Arylinden-1-ones Using Bakers' Yeast for the Preparation of (<i>S</i>)-3-Arylindan-1-ones
作者:William M. Clark、Andrew J. Kassick、Michael A. Plotkin、Ann M. Eldridge、Ivan Lantos
DOI:10.1021/ol991111+
日期:1999.12.1
[formula: see text] The bakers' yeastreduction of 3-(1,3-benzodioxol-5-yl)-6-propoxy-1H-inden-1-one 4 has been shown to give (S)-3-(1,3-benzodioxol-5-yl)-2,3-dihydro-6-propoxy-1H-indan-1-one 6 in 65% yield with high enantioselectivity (> 99.0% ee), a key intermediate for the synthesis of the endothelin receptor antagonist SB 217242. In addition, the substituted 3-arylinden-1-ones 10a-e gave equally
An efficient synthesis of chiral 3-arylindanones via iridium-catalyzed asymmetrichydrogenation of 3-arylindenones has been developed. The reaction showed good compatibility with various functional groups, delivering a variety of 3-arylindanones in excellent yields and with good enantioselectivities. The reaction was also carried out on a gram-scale, delivering the product in quantitative yield. In