Vitamin D3: synthesis of seco C-9,11,21-trisnor-17-methyl-1α, 25-dihydroxyvitamin D3 analogues
摘要:
The synthesis and biological activities of seco C-9,11,21-trisnor-17-methyl-1alpha,25-dihydroxyvitamin D-3 analogues (D-ring analogues) are described. (C) 2002 Elsevier Science Ltd. All rights reserved.
Vitamin D3: synthesis of seco C-9,11,21-trisnor-17-methyl-1α, 25-dihydroxyvitamin D3 analogues
摘要:
The synthesis and biological activities of seco C-9,11,21-trisnor-17-methyl-1alpha,25-dihydroxyvitamin D-3 analogues (D-ring analogues) are described. (C) 2002 Elsevier Science Ltd. All rights reserved.
The rhodium-catalyzed methylenation of aldehydes using trimethylsilyldiazomethane and triphenylphosphine produces a variety of terminal alkenes in excellent yields. These mild and nonbasic reaction conditions allow the conversion of enolizable substrates (keto aldehydes and nonracemic alpha-substituted aldehydes) to terminal alkenes without epimerization. Optimization of the reaction conditions led
Reductive One-Carbon Homologation of Aldehydes and Ketones
作者:Hélène Lebel、Chehla Ladjel
DOI:10.1021/jo0516741
日期:2005.11.1
A rhodium-catalyzed methylenation−hydrogenation cascade process allows the homologation of carbonyl compounds to lead to the corresponding alkanes in high yields.
[EN] VITAMIN D3 ANALOGUES FOR THE PREVENTION AND TREATMENT OF BONE DISORDERS<br/>[FR] ANALOGUES DE LA VITAMINE D3 POUR LA PREVENTION ET POUR LE TRAITEMENT DE TROUBLES OSSEUX
申请人:LEUVEN K U RES & DEV
公开号:WO2006039763A8
公开(公告)日:2011-09-01
Structural characterization and catalytic activity of the rhodium–carbene complex Rh(PPh3)2(IMes)Cl (IMes=bis(1,3-(2,4,6-trimethylphenyl)imidazol-2-ylidene)
作者:Gabriela A. Grasa、Zakhia Moore、Kenneth L. Martin、Edwin D. Stevens、Steven P. Nolan、Valérie Paquet、Hélène Lebel
DOI:10.1016/s0022-328x(02)01638-8
日期:2002.9
The rhodium-carbene complex Rh(PPh3)(2)(IMes)Cl (2) is an active catalyst for the hydroboration of simple olefins at room temperature. The reactivity of 2 was also tested in the methylenation of aldehydes. The crystal structure of 2 is also reported (C) 2002 Elsevier Science B.V. All rights reserved.