Enantioselective Synthesis of β-Aryloxycarboxylic Esters via Asymmetric Hydrogenation of β-Aryloxy-α,β-Unsaturated Esters
摘要:
A novel synthesis of beta-aryloxycarboxylic esters via asymmetric hydrogenation of the corresponding beta-aryloxy-alpha,beta-unsaturated esters has been demonstrated. Bis(norbornadiene)rhodium(I) tetrafluoroborate (1 mol %) and Walphos W008-1 were used to generate the saturated products with high enantioselectivity and in high yield. The tolerability of the reaction to a diverse range of substituents on the aromatic ring was also explored.
Provided herein are compounds of the formula (I):
as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of metabolic diseases and disorders such as, for example, type II diabetes mellitus.
[EN] PYRROLIDINONE GLUCOKINASE ACTIVATORS<br/>[FR] ACTIVATEURS DE PYRROLIDINONE GLUCOKINASE
申请人:HOFFMANN LA ROCHE
公开号:WO2009127546A1
公开(公告)日:2009-10-22
Provided herein are compounds of the formula (I): wherein X, R1, R2 and R3 are as defined in the specification, as well as pharmaceutically acceptable salts thereof. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of metabolic diseases and disorders such as, for example, type II diabetes mellitus.
Provided herein are compounds of the formula (I):
as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of metabolic diseases and disorders such as, for example, type II diabetes mellitus.
Stereoselective Synthesis of (<i>E</i>)-β-Aryloxyl and Alkyloxyl Acrylates Through DABCO-Catalysed Michael Additions of Phenols and Alcohols to Ethyl 2,3-Butadienoate
The development of DABCO-catalysed Michaeladdition of phenols and alcohols to ethyl 2,3-butadienoate provides an efficient synthetic pathway to (E)-β-aryloxyl and alkyloxyl acrylates in i-PrOH or under solvent-free conditions. The major advantages of the present method are wide substrate scope, mild reaction conditions, high stereoselectivity, and good reaction yields.