A simple and efficient procedure was developed for the preparation of a variety of aryl, hetero aryl and alkyl N-sulfinylimines (2b-2u) with excellent yields (85–94%) using tungstophosphoric acid as catalyst. Also, this new synthetic protocol features high conversion, shorter reaction time, a straight forward and simple work up procedure. Catalyst was recycled for 10 times without much loss in activity
KHSO<sub>4</sub>-Mediated Condensation Reactions of <i>tert</i>-Butanesulfinamide with Aldehydes. Preparation of <i>tert</i>-Butanesulfinyl Aldimines
作者:Yong Qin、Zhiyan Huang、Min Zhang、Yin Wang
DOI:10.1055/s-2005-865234
日期:——
tert-butanesulfinyl aldimines 1 were prepared by direct condensation of chiral tert-butanesulfinamide 3 with aldehydes 2 in high yields in the presence of KHSO 4 . The main advantage of KHSO 4 is that it is applicable to the condensation reactions of a variety of aldehydes, including electron deficient and electron rich (hetereo)aromatic aldehydes, as well as aliphatic aldehydes.
[EN] PYRAZOLE COMPOUNDS AS CCR1 ANTAGONISTS<br/>[FR] COMPOSÉS DE PYRAZOLE COMME ANTAGONISTES DE CCR1
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2009137338A1
公开(公告)日:2009-11-12
Disclosed are compounds of the formula I which block the interaction of CCR1 and its ligands and are thus useful for treating a variety of diseases and disorders that are mediated or sustained through the activity of CCR1 including autoimmune diseases, such as rheumatoid arthritis and multiple sclerosis. Also disclosed are pharmaceutical compositions comprising these compounds, methods of using these compounds in the treatment of various diseases and disorders, processes for preparing these compounds and intermediates useful in these processes.
[EN] PREPARATION OF PROTECTED ALPHA-KETO BETA-AMINO ESTERS AND AMIDES<br/>[FR] PRÉPARATION D'ESTERS ET D'AMIDES D'ALPHA-CÉTO-BÊTA-AMINO PROTÉGÉS
申请人:VERTEX PHARMA
公开号:WO2010002474A1
公开(公告)日:2010-01-07
The invention provides β-sulfonamide α-keto esters and amides in which the α-keto is protected as a 1,3-dithiolane derivative. Also provided are methods for preparing such esters and amides and for incorporating them into peptides.
The stereoselective synthesis of enantioenriched ANTI- and SYN-4-aminoalk-1-yn-3-ols is described. Initial reaction of racemic 3-(methoxymethoxy)allenylzinc with enantiopure Ellman’s ( SS )-( TERT-butylsulfinyl)imines was shown to give straightforward and highly stereoselective access to ANTI-( SS ,3 S,4 R)-3-(methoxy-methoxy)-4-sulfinamidoalk-1-ynes. Upon treatment with dry methanolic hydrochloric