Copper‐Mediated Conversion of Complex Ethers to Esters: Enabling Biopolymer Depolymerisation under Mild Conditions
作者:Ganyuan Xiao、James R. D. Montgomery、Christopher S. Lancefield、Isabella Panovic、Nicholas J. Westwood
DOI:10.1002/chem.202000088
日期:2020.9.25
into a biorefinery set‐up. An approach is described in which this unit is modified to incorporate a carboxylic ester with the goal of enabling the use of mild depolymerisation conditions. Inspired by preliminary results using a Cu/TEMPO/O2 system, a protocol was developed that gave the desired β‐O‐4‐containingester in high yield using certain dimeric model compounds. The optimised reaction conditions
木质素中β- O -4 单元的选择性加工对于这种生物聚合物的有效解聚至关重要,因此能够成功整合到生物精炼装置中。描述了一种方法,其中对该单元进行修改以掺入羧酸酯,目的是能够使用温和的解聚条件。受 Cu/TEMPO/O 2系统初步结果的启发,开发了一种方案,使用某些二聚模型化合物以高产率提供所需的含β- O -4 的酯。然后将优化的反应条件应用于低聚木质素模型系统。广泛的 2D NMR 分析表明,可以使用低聚底物实现类似的化学反应。含酯低聚物的温和解聚产生了预期的芳基酸单体。
Metal-free acceptorless dehydrogenative cross-coupling of aldehydes/alcohols with alcohols
reactions have achieved great success for accessing carbon–carbon and carbon–heteroatom bonds during the past decade, metal-free acceptorless dehydrogenative cross coupling is still scarce and highly desirable. Herein we report a robust metal-free acceptorless dehydrogenative cross-coupling for both carbon–heteroatom and carbon–carbonbondformation. By synergistic catalysis of the organophotocatalyst
Sarbhai,K.P.; Mathur,K.B.L., Indian Journal of Chemistry, 1966, vol. 4, p. 81 - 85
作者:Sarbhai,K.P.、Mathur,K.B.L.
DOI:——
日期:——
(S) 2-METHYLAMINO-2-PHENYL-$i(n)-BUTYL 3,4,5-TRIMETHOXYBENZOATE, ITS APPLICATION TO THE TREATMENT OF CHRONIC PAIN
申请人:PARKE-DAVIS
公开号:EP0993436A1
公开(公告)日:2000-04-19
[EN] (S) 2-METHYLAMINO-2-PHENYL-n-BUTYL 3,4,5-TRIMETHOXYBENZOATE, ITS APPLICATION TO THE TREATMENT OF CHRONIC PAIN<br/>[FR] (S) 2-METHYLAMINO-2-PHENYL-n-BUTYLE 3,4,5-TRIMETHOXYBENZOATE ET SON UTILISATION DANS LE TRAITEMENT DE LA DOULEUR CHRONIQUE
申请人:PARKE-DAVIS
公开号:WO1999001417A1
公开(公告)日:1999-01-14
(EN) The present invention provides optically pure (S) 2-methylamino-2-phenyl-$i(n)-butyl 3,4,5-trimethoxybenzoate for use in the treatment of chronic pain, and having Formula (I). The present invention also provides methods of using the compound of Formula (I), and to pharmaceutical compositions that contain the compound of Formula (I).(FR) La présente invention concerne un (S) 2-méthylamino-2-phényl-$i(n)-butyle 3,4,5-triméthoxybenzoate, utile dans le traitement de la douleur chronique et correspondant à la formule (I). L'invention concerne également des méthodes d'utilisation du composé de la formule (I) ainsi que des compositions pharmaceutiques contenant ce composé.