Reverse hydroxamic acid derivatives having specific structure represented by a general formula (Ia):
1
(wherein A is a hydrogen atom or the like; Ar
1
is an arylene or the like; Ar
2
is an optionally substituted aryl, a heteroaryl or the like; R
1
is a hydrogen atom, an alkyl or the like; R
2a
is a substituted cycloaryl, a heterocycloaryl or the like) and a general formula (I):
2
(wherein A, Ar
1
, Ar
2
, and R
1
are the same as defined above and R
2
is an hydrogen atom, R
2a
or the like) and salts thereof, which have TNF-&agr; converting enzyme (TACE) inhibitory activity.
Mizoroki–Heck Cyclizations of Amide Derivatives for the Introduction of Quaternary Centers
作者:Jose M. Medina、Jesus Moreno、Sophie Racine、Shuaijing Du、Neil K. Garg
DOI:10.1002/anie.201703174
日期:2017.6
report non-decarbonylative Mizoroki–Heck reactions of amide derivatives. The transformation relies on the use of nickel catalysis and proceeds using sterically hindered tri- and tetrasubstituted olefins to give products containing quaternary centers. The resulting polycyclic or spirocyclic products can be obtained in good yields. Moreover, a diastereoselective variant of this method gives access to an