Enantioselective preparation of (R) and (S)-3-hydroxycyclopentanone by kinetic resolution
摘要:
A straightforward approach to enantiomerically enriched (R) and (S)-3-hydroxycyclopentanone is described. The key step involves a kinetic resolution of racemic 3-hydroxycyclopentanone using commercial Pseudomonas cepacia lipase immobilized on diatomite (Amano lipase PS-DI). The absolute stereochemistry of the product was determined by derivatization into (R)-3-(benzyloxy)-cyclopentanone. (C) 2012 Elsevier B.V. All rights reserved.
3-Carbonylamino-8-aminoisoquinoline compounds of formula (I):
variations thereof, and their use as inhibitors of HPK1 (hematopoietic kinase 1) are described. The compounds are useful in treating HPK1-dependent disorders and enhancing an immune response. Also described are methods of inhibiting HPK1, methods of treating HPK1-dependent disorders, methods for enhancing an immune response, and methods for preparing the 3-carbonylamino-8-aminoisoquinoline compounds.
作者:Bi-Shuang Chen、Verena Resch、Linda G. Otten、Ulf Hanefeld
DOI:10.1002/chem.201405579
日期:2015.2.9
enantioselective Michael addition using water as both nucleophile and solvent has to date proved beyond the ability of synthetic chemists. Herein, the direct, enantioselective Michael addition of water in water to prepare important β‐hydroxy carbonyl compounds using wholecells of Rhodococcus strains is described. Good yields and excellent enantioselectivities were achieved with this method. Deuterium
Prostaglandin endoperoxides. 14. Solvent-induced fragmentation of prostaglandin endoperoxides. New aldehyde products from PGH2 and a novel intramolecular 1,2-hydride shift during endoperoxide fragmentation in aqueous solution
作者:Robert G. Salomon、Donald B. Miller、Michael G. Zagorski、Daniel J. Coughlin
DOI:10.1021/ja00332a049
日期:1984.10
Mise en evidence d'un remarquable effet de solvant sur la stabilite du noyau endoperoxyde dioxa-2,3 bicyclo [2.2.1] heptane, de la prostaglandine PGH2. Effet isotopique cinetique du deuterium
Mise en evidence d'un remarquable effet de solvant sur la stabilite du noyau endoperoxyde dioxa-2,3 bicyclo [2.2.1] 庚烷,de la prostaglandine PGH2。氘同位素效应
Synthesis and characterization of N-hydroxyphthalimide immobilized on SiO2-coated Fe3O4 nanoparticles as magnetic catalyst for oxidation of benzyl alcohols and hydrocarbons
successfully attached on functionalized SiO2-coated Fe3O4 nanoparticles through amid bond. The sustained nanomagnetite-immobilized NHPI as a new magnetically recoverable catalyst was characterized by FT-IR, XRD, TGA, VSM, TEM and SEM techniques. The prepared catalyst exhibited high selectivity for oxidation of various benzyl alcohols and hydrocarbons in the presence of hydrogenperoxide as oxidant. The catalyst
在这项研究中,N-羟基邻苯二甲酰亚胺(NHPI)通过酰胺键成功地附着在功能化的SiO 2包覆的Fe 3 O 4纳米颗粒上。通过FT-IR,XRD,TGA,VSM,TEM和SEM技术对作为新型磁性可回收催化剂的纳米磁铁矿持续固定化进行了表征。制备的催化剂在过氧化氢作为氧化剂的存在下对各种苄醇和烃的氧化显示出高选择性。使用外部磁体可以很容易地将催化剂从反应混合物中分离出来并重复使用数次,而不会显着降低其催化活性。
Industrially scalable and cost-effective synthesis of 1,3-cyclopentanediol with furfuryl alcohol from lignocellulose
A new route for the synthesis of renewable 1,3-cyclopentanediol was developed by rearrangement of furfurylalcohol to 4-hydroxycyclopent-2-enone followed by hydrogenation.