Stereoselective preparation of lipidated carboxymethyl-proline/pipecolic acid derivatives via coupling of engineered crotonases with an alkylmalonyl-CoA synthetase
作者:Refaat B. Hamed、Luc Henry、J. Ruben Gomez-Castellanos、Amina Asghar、Jürgen Brem、Timothy D. W. Claridge、Christopher J. Schofield
DOI:10.1039/c3ob41525b
日期:——
The trisubstituted enolate- and C–C bond-forming capacities of engineered carboxymethylproline synthases CMPSs are coupled with the malonyl-CoA synthetase MatB to enable stereoselective preparation of 5- and 6-membered N-heterocycles functionalised with alkyl-substituted carboxymethyl side chains, starting from achiral alkyl-substituted malonic acids and L-amino acid semialdehydes. The results illustrate the biocatalytic utility of crotonases in tandem enzyme-catalysed reactions for stereoselective synthesis.
A zinc complex characterized in exhibiting an octahedral structure and being configured from repeating units represented by general formula (I):
wherein L represents a linker region, and R
1
represents a C1-4 alkyl group, which can have a halogen atom.
Novel hetaryl-[1,8]naphthyridine derivatives of formula (I) wherein R1, R2, W1, W3, W5 and W6 have the meaning according to claim 1, are inhibitors of ATP consuming proteins, and can be employed, inter alia, for the treatment of tumors.
Novel hetaryl-[1,8]naphthyridine derivatives of formula (I)
wherein R1, R2, W
1
, W
3
, W
5
and W
6
have the meaning according to claim
1
, are inhibitors of ATP consuming proteins, and can be employed, inter alia, for the treatment of tumors.
ALCOHOL PRODUCTION METHOD BY REDUCING ESTER OF LACTONE WITH HYDROGEN
申请人:KURIYAMA Wataru
公开号:US20100063294A1
公开(公告)日:2010-03-11
Provided is an alcohol production method comprising the step of reducing an ester or a lactone with hydrogen to produce a corresponding alcohol without addition of a base compound by using, as a catalyst, a ruthenium complex represented by the following general formula (1):
RuH(X)(L
1
)(L
2
)
n
(1)
wherein
X represents a monovalent anionic ligand,
L
1
represents a tetradentate ligand having at least one coordinating phosphino group and at least one coordinating amino group or a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, and
L
2
represents a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, provided that
n is 0 when L
1
is the tetradentate ligand, and n is 1 when L
1
is the bidentate aminophosphine ligand.