PHARMACEUTICAL COMPOSITIONS FOR TOPICAL APPLICATION
申请人:MacroChem Corporation
公开号:EP1648364A2
公开(公告)日:2006-04-26
Pharmaceutical Compositions for Topical Application
申请人:Chan Thomas
公开号:US20070287688A1
公开(公告)日:2007-12-13
Compounds of Formula I are useful as skin penetration enhancing agents: (I) wherein: R represents a linear, saturated or unsaturated, substituted or unsubstituted hydrocarbyl radical; and X represents a —(CO)O—, —O(CO)—, C═O, CONH, O, NHCONH, S, or S═O radical. Compositions and methods using these compounds are also described.
[EN] PHARMACEUTICAL COMPOSITIONS FOR TOPICAL APPLICATION<br/>[FR] COMPOSITIONS PHARMACEUTIQUES POUR APPLICATION TOPIQUE
申请人:MACROCHEM CORP
公开号:WO2005007100A2
公开(公告)日:2005-01-27
Compounds of Formula I are useful as skin penetration enhancing agents: (I) wherein: R represents a linear, saturated or unsaturated, substituted or unsubstituted hydrocarbyl radical; and X represents a -(CO)O-, -O(CO)-, C=O, CONH, O, NHCONH, S, or S=O radical. Compositions and methods using these compounds are also described.
Pd(II)-Catalyzed Chemoselective Acetoxylation of C(sp<sup>2</sup>)–H and C(sp<sup>3</sup>)–H Bonds in Tertiary Amides
作者:Muniyappa Vijaykumar、Benudhar Punji
DOI:10.1021/acs.joc.1c00629
日期:2021.6.18
Palladium-catalyzed chemoselective C(sp2)–H and C(sp3)–H acetoxylation of synthetically useful tertiary amides is reported under relatively mild reaction conditions. This protocol proceeds through the assistance of a weakly coordinated directing group (C═O) and requires low catalyst (1.0 mol %) loading. Diverse functionalities, such as C(sp2)–Cl, C(sp3)–Cl, −CF3, −COOEt, and −NO2 groups, including
easily removed via visible light irradiation under mild conditions. We found that an excited phenolate-type photocatalyst efficiently transfers an electron to the benzene ring of benzyl-derived protecting groups to generate a phenyl radical anion. The benzyl C–N or C–O bond is then mesolytically cleaved by releasing a benzylradical. This method enables efficient deprotection of the benzyl group on amides