Cu(OTf)<sub>2</sub> catalyzed Ugi-type reaction of <i>N</i>,<i>O</i>-acetals with isocyanides for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides
作者:Zhuo-Ya Mao、Xiao-Di Nie、Yi-Man Feng、Chang-Mei Si、Bang-Guo Wei、Guo-Qiang Lin
DOI:10.1039/d1cc03113a
日期:——
The Cu(OTf)2 catalyzed Ugi-type reactions of N,O-acetals with isocyanides have been described for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides. 4-Hydroxy-5-substituted-prolinamides can be obtained in high diastereoselectivities (2,4-cis/trans > 19 : 1) and a stereoselective model was proposed for 2,4-cis selectivity. Moreover, 4-F-VH 032, a novel analog of the VHL ligand, was conveniently
This work represents the first catalytic hydrogenation of imides into amides and primary alcohols, in which the unique chemoselectivity is originated from the bifunctional nature of ruthenium-NH moiety in the catalyst.
The present invention relates to the use of novel pyrrolopyrazine derivatives of Formula I,
wherein the variables Q and R
1
and R
2
are defined as described herein, which inhibit JAK and SYK and are useful for the treatment of auto-immune and inflammatory diseases.
The present invention relates to the use of novel pyrrolopyrazine derivatives of Formula I,
wherein the variables Q and R1 and R2 are defined as described herein, which inhibit JAK and SYK and are useful for the treatment of auto-immune and inflammatory diseases.