Laccase-catalyzed domino reactions of 4-hydroxy-6-methyl-2H-pyran-2-one or substituted 4-hydroxy-2H-chromen-2-ones with catechols using molecular oxygen as an oxidant afford coumestans and related O-heterocycles with yields ranging from 51% to 99%.
A copper-catalyzed intramolecular cross dehydrogenative C–O coupling reaction of 2′-hydroxyl-3-arylcoumarins was developed. This protocol provided a facile and efficient strategy for the construction of natural coumestans and derivatives in moderate to high yields. This transformation exhibited good functional group compatibility and was amenable to substrates with free phenolic hydroxyl groups.
[EN] COUMESTAN, COUMESTROL, COUMESTAN DERIVATIVES AND PROCESSES OF MAKING THE SAME AND USES OF SAME<br/>[FR] COUMESTAN, COUMESTROL, DÉRIVÉS DU COUMESTAN, PROCÉDÉS DE FABRICATION ASSOCIÉS ET APPLICATIONS
申请人:BG NEGEV TECHNOLOGIES & APPLIC LTD
公开号:WO2014106848A1
公开(公告)日:2014-07-10
The present invention provides new coumestans compounds and processes for the preparation of coumestans, pharmaceutical compositions having a coumestan as an active pharmaceutical ingredient, and methods of utilizing coumestans as selective estrogen receptor modulators (SERMs) for treating estrogen dependent diseases such as breast cancer.
Plant isoflavonoid hydroxylases and methods of use thereof
申请人:Dixon A. Richard
公开号:US20050172354A1
公开(公告)日:2005-08-04
The invention provides plant isoflavonoid hydroxylase coding sequences. Also provided are constructs comprising these sequences, plants transformed therewith and methods of use thereof. In certain aspects of the invention, plants transformed with the nucleic acids are provided exhibiting improved pest and disease resistance. Plants provided by the invention may also exhibit improved nutritional qualities.
Coumestan, Coumestrol, Coumestan Derivatives and Processes of Making the Same and Uses of Same
申请人:B.G. NEGEV TECHNOLOGIES AND APPLICATIONS LTD.
公开号:US20150336977A1
公开(公告)日:2015-11-26
The present invention provides new coumestans compounds and processes for the preparation of coumestans, pharmaceutical compositions having a coumestan as an active pharmaceutical ingredient, and methods of utilizing coumestans as selective estrogen receptor modulators (SERMs) for treating estrogen dependent diseases such as breast cancer.