either carboxylic acids or alcohols are normally needed. We found that the directcondensation of equimolar amounts of carboxylic acids and alcohols could be achieved using hafnium(IV) or zirconium(IV) salts. These metal salts are highly effective as catalysts for the selective esterification of primary alcohols with carboxylic acids in the presence of secondary alcohols or aromatic alcohols. The present
[EN] PYRROLO[2,3-B]PYRIDINE CDK9 KINASE INHIBITORS<br/>[FR] INHIBITEURS DE PYRROLO[2,3-B]PYRIDINE CDK9 KINASE
申请人:ABBVIE INC
公开号:WO2014139328A1
公开(公告)日:2014-09-18
Disclosed are compounds of Formula (IIa), wherein R1, R2, R3A, R3B, R3C, R3D, R3E, and R4 are as defined in the specification, and pharmaceutically acceptable salts thereof. The compounds may be used as agents in the treatment of diseases, including cancer. Also provided are pharmaceutical compositions comprising one or more compounds of Formula (IIa).
Synthesis and utilization of functionalized polystyrene resins
作者:Gemma L. Thomas、Christine Böhner、Mark Ladlow、David R. Spring
DOI:10.1016/j.tet.2005.07.118
日期:2005.12
Co-polymerised 4-bromopolystyrene has been converted to a range of polymer-supportedreagents and scavengers by bromine–magnesium exchange using Oshima's trialkylmagnesate complex followed by quenching with a variety of electrophiles. Mitsunobu, halogenation and Wittig reactions, were explored to assess the utility of the resins for target oriented and diversity oriented synthesis.
SUBSTITUTED CYANO CYCLOALKYL PENTA-2,4-DIENES, CYANO CYCLOALKYL PENT-2-EN-4-YNES, CYANO HETEROCYCLYL PENTA-2,4-DIENES AND CYANO HETEROCYCLYL PENT-2-EN-4-YNES AS ACTIVE SUBSTANCES
申请人:BAYER CROPSCIENCE AKTIENGESELLSCHAFT
公开号:US20170210701A1
公开(公告)日:2017-07-27
The invention relates to cyano cycloalkyl penta-2,4-dienes, cyano cycloalkyl pent-2-en-4-ynes, cyano heterocyclyl penta-2,4-dienes and cyano heterocyclyl pent-2-en-4-ynes of general formula (I), or the salts thereof, where [X-Y], Q, R
1
, R
2
, A
1
, A
2
, V, W, m and n have the definitions specified in the description. The invention also relates to a production method for same and to the use of same for increasing stress tolerance in plants against abiotic stress, and/or for increasing the plant yield.
The first total syntheses of lyngbyabellins A and B, Lyngbya majuscula derived lipopeptides, are described. The functionalized thiazole carboxylic acid units were prepared by the oxidative dehydrogenation of the corresponding thiazolidines with chemical manganese dioxide. The asymmetric synthesis of the dichlorinated β-hydroxy acid by a chiral oxazaborolidinone mediated aldol reaction. Finally, fragment