Ruthenium-Catalyzed Alkylation of Cyclopropanols with Sulfoxonium Ylides via C–C Bond Cleavage: Formation of Diverse 1,5-Diketones
作者:Mei Guan、Yong Wu、Xin Huang、Jianglian Li、Hua He、Kaichuan Yan、Ruizhi Lai、Yi Luo
DOI:10.1055/a-1588-0974
日期:2022.2
A novel ruthenium-catalyzed alkylation of cyclopropanols with sulfoxonium ylides has been developed that affords diverse 1,5-diketones with good efficiency and broad substrate scope. To illustrate the synthetic applications of the obtained 1,5-diketones, aldol and cyclization reactions have been investigated. Preliminary mechanistic studies suggest that this process involves a sequential C–C activation
Zn(II)- or Rh(I)-Catalyzed Rearrangement of Silylated [1,1′-Bi(cyclopropan)]-2′-en-1-ols
作者:Hang Zhang、Changkun Li、Guojun Xie、Bo Wang、Yan Zhang、Jianbo Wang
DOI:10.1021/jo5010923
日期:2014.7.3
The rearrangement reactions of silylated alcohols bearing the highly strained structures of cyclopropene and cyclopropanol connected in adjacent positions have been studied under ZnI2- and Rh(I)-catalyzed conditions. The results show intriguing carbon skeletal reorganizations of such system under these conditions. The ZnI2-catalyzed reaction proceeds with C–O cleavage and the rearrangement of the resultant
Reaction of alkynes with cyclopropylcarbene-chromium complexes: a versatile [4+2+1-2] cycloaddition reaction for the construction of cyclopentenones
作者:Seniz U. Tumer、James W. Herndon、Leonard McMullen
DOI:10.1021/ja00048a008
日期:1992.10
limitations of the reaction between cyclopropylcarbene-chromium complexes and alkynes have been examined. A variety of cyclopropylcarbene complexes and alkynes have been employed in these studies. The reaction appears to be general for most simple alkynes, producing cyclopentenones. A mechanism has been proposed involving metallacyclobutene formation, electrocyclic ringopening, electrocyclic ring closure, CO
Chalcone and its analogs as agents for the inhibition of angiogenesis and related disease states
申请人:——
公开号:US20020040029A1
公开(公告)日:2002-04-04
The present invention relates to chalcone and chalcone derivatives and analogs which are useful as angiogenesis inhibitors. The present compounds, which are inexpensive to synthesize, exhibit unexpectedly good activity as angiogenesis inhibitors. The present invention also relates to the use of chalcone and its analogs as antitumor/anticancer agents and to treat a number of conditions or disease states in which angiogenesis is a factor, including angiongenic skin diseases such as psoriasis, acne, rosacea, warts, eczema, hemangiomas, lymphangiogenesis, among numerous others, as well as chronic inflammatory disease such as arthritis.
DIPHENYL AZEPANE, DIAZEPANE AND OXAZEPANE DERIVATIVES AND USES THEREOF
申请人:Schoenfeld Ryan Craig
公开号:US20110136787A1
公开(公告)日:2011-06-09
Compounds of the formula I:
wherein m, n, X
1
, X
2
, Y
1
, Y
2
, R
1
and R
2
are as defined herein. Also provided are pharmaceutical compositions, methods of using, and methods of preparing the compounds.