Releasable linkage and compositions containing same
申请人:Zalipsky Samuel
公开号:US20050265925A1
公开(公告)日:2005-12-01
Conjugates comprising a lipid or a hydrophilic polymer, such as polyethyleneglycol, linked to a ligand derived from an amine- or hydroxyl-containing compound, such as a drug or protein, are stable under conditions of storage, and are cleavable under mild thiolytic conditions to regenerate the amine- or hydroxyl-containing compound in its native form, without the formation of undesirable side products.
Expeditious diastereoselective construction of a thiochroman skeleton via a cinchona alkaloid-derived catalyst
作者:Zhiyun Du、Chenggang Zhou、Yaojun Gao、Qiao Ren、Kun Zhang、Hansong Cheng、Wei Wang、Jian Wang
DOI:10.1039/c1ob06497e
日期:——
diastereoselective and enantioselectivesynthesis of thiochroman derivatives through a sulfa-Michael–Michael cascadesequence is disclosed. This is a significant complement of the quinine-thiourea catalyzed sulfa-Michael–Michael cascade reaction. The denselyfunctionalized target thiochromans were obtained in high diastereoselectivities, and with high to excellent enantioselectivities.
Enantioselective Organocatalytic Double Michael Addition Reactions
作者:Hao Li、Liansuo Zu、Hexin Xie、Jian Wang、Wei Jiang、Wei Wang
DOI:10.1021/ol070581y
日期:2007.4.1
[GRAPHICS]A novel organocatalytic, enantioselective domino double Michael addition reaction of alpha,beta-unsaturated aldehydes with ethyl 4-mercapto-2-butenoate has been developed. The process is promoted by chiral diphenylprolinol TMS ether to give chiral tetrahydrothiophenes in high to excellent levels of enantioselectivities.
A Highly Stereoselective Hydrogen-Bond-Mediated Michael–Michael Cascade Process through Dynamic Kinetic Resolution
作者:Jian Wang、Hexin Xie、Hao Li、Liansuo Zu、Wei Wang
DOI:10.1002/anie.200800381
日期:2008.5.19
PANETTA, J. A.;RAPOPORT, H., J. ORG. CHEM., 1982, 47, N 13, 2626-2628