Regioselective Carbonylative Heteroannulation of o-Iodothiophenols with Allenes and Carbon Monoxide Catalyzed by a Palladium Complex: A Novel and Efficient Access to Thiochroman-4-one Derivatives
摘要:
The palladium-catalyzed carbonylative ring-forming reactions of 2-iodothiophenol, and the corresponding substituted derivatives, with allenes and carbon monoxide are described. The reactions afford thiochroman-4-ones in good to excellent isolated yields with quite high regioselectivity. The catalytic heteroannulation may involve regioselective addition of the sulfur moiety of the reactants on the more positive end of the allene, arylpalladium formation, CO insertion, subsequent intramolecular cyclization, and then reductive elimination. The regioselectivity is probably governed by electronic effects.
Diarylselenide compounds and their use in human or veterinary medicine and in cosmetics
申请人:Bernardon Jean-Michel
公开号:US20060014803A1
公开(公告)日:2006-01-19
The invention concerns novel diarylselenide compounds corresponding to formula (I):
and the use thereof in pharmaceutical compositions in human or veterinary medicine (in the treatment of dermatological, rheumatic, cardiovascular and ophthalmologic pathologies in particular), or in cosmetic compositions.
Bi-aromatic compounds linked via a heteroethylene radical, and pharmaceutical and cosmetic compositions using them
申请人:Galderma Research & Development
公开号:US20030100583A1
公开(公告)日:2003-05-29
Bi-aromatic compounds linked via a heteroethynylene radical are provided along with pharmaceutical and cosmetic compositions containing these compounds and methods for their use.
提供了通过异乙炔基团连接的双芳香化合物,以及含有这些化合物的药用和化妆品组合物,以及其使用方法。
Nickel‐Catalyzed Electrochemical Synthesis of Dihydro‐Benzo[b]thiophene Derivatives
Abstract The intramolecular electrochemical reductive cyclization of ortho‐haloaryl allyl thioethers catalyzed by Ni(II) complexes associated to cyclam ligands affords dihydro‐benzo[b]thiophene derivatives in moderate to good yields. #Dedicated to Pr. E. Dinjus for its 60th anniversary.
Heteroethylene compounds and pharmaceutical and cosmetic compositions containing same
申请人:Galderma Research & Development S.N.C.
公开号:US06444709B1
公开(公告)日:2002-09-03
The invention relates to novel heteroethynylenic compounds having the general formula (I):
as well as to the use of these compounds in pharmaceutical compositions intended for use in human or veterinary medicine (dermatological, rheumatic, respiratory, cardiovascular and ophthalmological complaints in particular), or alternatively in cosmetic compositions.
Bi-aromatic compounds bound by a heteroethynylene radical and pharmaceutical and cosmetic compositions containing same
申请人:Galderma Research & Development
公开号:US06201019B1
公开(公告)日:2001-03-13
Bi-aromatic compounds linked via a heteroethynylene radical are provided along with pharmaceutical and cosmetic compositions containing these compounds and methods for their use.