2-Substituted 3-chlorobenzaldehydes were prepared from the corresponding 2-(3-chlorophenyl)-1,3-dioxolanes using an ortho-lithiation strategy. The 6-chloro-2-formylbenzamide exists only in a ring form, but 6-chloro-2-formylbenzoic acid esters were isolated in both forms as open chain and cyclic tautomers. 7-Chloro-3-hydroxy-3H-isobenzofuran-1-one reacted with nucleophilic reagents at the carbonyl or quaternary carbon depending on the character of nucleophile.
Chemoselective deprotection and deprotection with concomitant reduction of 1,3-dioxolanes, acetals and ketals using nickel boride
作者:Jitender M. Khurana、Kiran Dawra、Purnima Sharma
DOI:10.1039/c4ra15404e
日期:——
An efficient and mild methodology for the reductive deprotection of 1,3-dioxolanes, acetals and ketals to the corresponding aldehydes/ketones and also deprotection with concomitant reduction to the corresponding alcohols has been achieved in quantitative yields using nickel boride generated in situ from nickel chloride and sodium borohydride in methanol. The reactions are chemoselective as halo, alkoxy
SUBSTITUTED PYRAZOLE COMPOUNDS AS RORgammaT INHIBITORS AND USES THEREOF
申请人:Merck Sharp & Dohme Corp.
公开号:US20180016239A1
公开(公告)日:2018-01-18
The present invention relates to compounds according to Formula (I-1) and pharmaceutically acceptable salts thereof. Such compounds can be used in the treatment of RORgammaT-mediated diseases or conditions.
Nickel‐Catalyzed Chemoselective Acetalization of Aldehydes With Alcohols under Neutral Conditions
作者:Murugan Subaramanian、Vinod G. Landge、Akash Mondal、Virendrakumar Gupta、Ekambaram Balaraman
DOI:10.1002/asia.201900908
日期:2019.12.13
A molecularly defined NiII -complex catalyzing the chemoselective acetalization of aldehydes with alcohols underneutralconditions is reported. The reaction is general, efficient and showed a wide substrate scope (including aliphatic aldehydes) as well as excellent functional group tolerance. Reusability of the present nickel catalyst is also demonstrated.
Intermolecular Reactions of Chlorohydrine Anions: Acetalization of Carbonyl Compounds under Basic Conditions
作者:Michał Barbasiewicz、Mieczysław Ma̧kosza
DOI:10.1021/ol0613113
日期:2006.8.1
[reaction: see text] Nonenolizable aldehydes and ketones react with 2-chloroethanol and 3-chloropropanol under basic conditions (t-BuOK, DMF/THF) with formation of 2-substituted 1,3-dioxolanes and 1,3-dioxanes, respectively. Conversion of the two-step addition-alkylation process depends on the electrophilicity of the carbonyl group that governs the equilibrium of addition of chloroalkoxides. This method