Synthesis of Indole Analogues of the Natural Schweinfurthins
摘要:
An interest in the schweinfurthins, natural stilbenes with significant antiproliferative activity, has prompted efforts to prepare a set of indole analogues. To approach the desired compounds through a Horner-Wadsworth-Emmons condensation, new indole derivatives bearing a phosphonomethyl substituent in the B-ring were required. The parent indole system with the necessary substitution pattern was obtained through Stobbe condensation and cyclization. A prenyl substituent was incorporated at the C3 position of a 4,6-disubstituted indole through a highly regioselective electrophilic aromatic substitution reaction, while metalation and alkylation provided the C2-prenylated indole. After introduction of the phosphonate group through classical reactions, the new indole phosphonates were found to undergo the desired condensation with nonracemic aldehydes representing the schweinfurthin left half. This approach provides facile access to new heteroaromatic analogues of the natural schweinfurthins and should be applicable to many other natural stilbenes as well.
The invention provides a compound of formula (I): wherein R
1
-R
5
have any of the values defined in the specification. The compounds are useful for the treatment of cancer and other diseases.
Synthesis of Indole Analogues of the Natural Schweinfurthins
作者:John G. Kodet、David F. Wiemer
DOI:10.1021/jo4014244
日期:2013.9.20
An interest in the schweinfurthins, natural stilbenes with significant antiproliferative activity, has prompted efforts to prepare a set of indole analogues. To approach the desired compounds through a Horner-Wadsworth-Emmons condensation, new indole derivatives bearing a phosphonomethyl substituent in the B-ring were required. The parent indole system with the necessary substitution pattern was obtained through Stobbe condensation and cyclization. A prenyl substituent was incorporated at the C3 position of a 4,6-disubstituted indole through a highly regioselective electrophilic aromatic substitution reaction, while metalation and alkylation provided the C2-prenylated indole. After introduction of the phosphonate group through classical reactions, the new indole phosphonates were found to undergo the desired condensation with nonracemic aldehydes representing the schweinfurthin left half. This approach provides facile access to new heteroaromatic analogues of the natural schweinfurthins and should be applicable to many other natural stilbenes as well.
[EN] SCHWEINFURTHIN ANALOGUES<br/>[FR] ANALOGUES DE SCHWEINFURTHINES
申请人:UNIV IOWA RES FOUND
公开号:WO2013148584A1
公开(公告)日:2013-10-03
The invention provides a compound of formula (I): wherein R1-R5 have any of the values defined in the specification. The compounds are useful for the treatment of cancer and other diseases.