Gas-phase pyrolytic reactions. part 3. Hammett ϱ constants of gas-phase eliminations of alkyl arylcarboxylate and ethanoate esters and their correlation with substrate molecular framework
Intramolecular Rearrangement of α-Azidoperoxides: An Efficient Synthesis of tert-Butyl Esters
摘要:
An unprecedented intramolecular rearrangement of alpha-azidoperoxides, promoted by simple organic base to provide tert-butyl esters, has been presented. Further, a one-pot methodology consisting of in situ generation of the a-azidoperoxides from corresponding aldehydes followed by base-promoted rearrangement to obtain the desired ester has also been executed. Relevant mechanistic studies, to provide the proof for intramolecular alkoxy transfer, are investigated.
Copper-catalyzed oxidative esterification of aldehydes with dialkyl peroxides: efficient synthesis of esters of tertiary alcohols
作者:Yefeng Zhu、Yunyang Wei
DOI:10.1039/c3ra40246k
日期:——
Copper-catalyzed oxidative esterification of aldehydes with dialkyl peroxides has been developed. This protocol affords a novel approach for the synthesis of carboxylic esters of tertiary alcohols under mild conditions. Depending on the catalyst system, a variety of tertiary esters were produced in good to excellent yields.
The invention relates to amidic oxotetrahydro-2H-furo[3.2-b]pyrrol-4(5H)-yl) derivatives as dual CatS/K inhibitors, to pharmaceutical compositions containing these compounds and also to these compounds for use in the treatment and/or prophylaxis of pain and further diseases and/or disorders.
[EN] 3-OXO-TETRAHYDRO-FURO[3,2-B]PYRROL-4(5H)-YL) DERIVATIVES II<br/>[FR] DÉRIVÉS II DU 3-OXO-TÉTRAHYDRO-FURO[3,2-B]PYRROL-4(5H)-YLE
申请人:GRUENENTHAL GMBH
公开号:WO2015161924A1
公开(公告)日:2015-10-29
The invention relates to amidic oxotetrahydro-2H-furo[3.2-b]pyrrol-4(5H)-yl) derivatives as dual CatS/K inhibitors exhibiting a pronounced CatK-inhibition, to pharmaceutical compositions containing these compounds and also to these compounds for use in the treatment and/or prophylaxis of pain and further diseases and/or disorders.
Ag(I)-Catalyzed C–H Carboxylation of Thiophene Derivatives
作者:Mijung Lee、Young Kyu Hwang、Jaesung Kwak
DOI:10.1021/acs.organomet.1c00372
日期:2021.9.27
thiophene derivatives. This new catalytic system involving a phosphine ligand and lithium tert-butoxide enables the direct carboxylation of thiophenes under mild reaction conditions. Experimental studies revealed that the use of tert-butylalkoxide is critical for the exergonic formation of an arylsilver intermediate, and the results were further supported by density functional theory calculations.
CO 2 的利用是一个有吸引力的方面,因为它允许将 CO 2直接转化为有价值的化学品。在这方面,由于杂芳族羧酸无处不在的结构基序,将CO 2直接结合到杂芳族化合物的 C-H 键中是很重要的。在此,我们报告了 Ag 催化的噻吩衍生物的 C-H 羧化。这种涉及膦配体和叔丁醇锂的新催化系统能够在温和的反应条件下直接羧化噻吩。实验研究表明,使用叔丁基醇盐对于芳基银中间体的放能形成至关重要,密度泛函理论计算进一步支持了结果。