Diethoxytriphenylphosphorane: a mild, regioselective cyclodehydrating reagent for conversion of diols to cyclic ethers: stereochemistry, synthetic utility, and scope
Osmium tetroxide in poly(ethylene glycol) (PEG): a recyclable reaction medium for rapid asymmetric dihydroxylation under Sharpless conditionsDedicated to Prof. Goverdhan Mehta on his 60th birthday.Electronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b3/b305154b/
Reaction of the N-(α-chloroalkyloxycarbonyl)pyrrolidines 1 with lithium powder and a catalytic amount of 4,4′-di-tert-butylbiphenyl (DTBB, 2.5 mol-%) in the presence of different electrophiles [iBuCHO, tBuCHO, PhCHO, Et2CO, (CH2)5CO, PhCOMe, Ph2CO, Me3SiCl], in THF at temperatures ranging between –78 and –60°C leads, after hydrolysis with water, to the expected functionalized carbamates 2. Deprotection
[EN] QUINOLONE DERIVATIVES AS FIBROBLAST GROWTH FACTOR RECEPTOR INHIBITORS<br/>[FR] DÉRIVÉS DE QUINOLONE UTILISÉS EN TANT QU'INHIBITEURS DU RÉCEPTEUR DU FACTEUR DE CROISSANCE DES FIBROBLASTES
申请人:PRINCIPIA BIOPHARMA INC
公开号:WO2015120049A1
公开(公告)日:2015-08-13
Compounds that are Fibroblast Growth Factor Inhibitors (FGFR) and are therefore useful for the treatment of diseases treatable by inhibition of FGFR are disclosed. Also disclosed are pharmaceutical compositions containing such compounds and processes for preparing such compounds.
Determination of enantiomeric purity of glycols RCHOHCH2OH
作者:Ernest L. Eliel、Kwang-Youn Ko
DOI:10.1016/s0040-4039(00)88164-2
日期:1983.1
The enantiomericpurity of primary-secondary glycols, RCHOHCH2OH, is conveniently determined by conversion to a pair of epimeric 1,3-dioxolanes through condensation with benzaldehyde, followed by NMRspectroscopy in presence of a chiral shift reagent with observation of the benzylic protons.
[EN] NOVEL SUBSTITUTED SPIRO-[INDOLINE HETEROCYCLOALKANE] COMPOUNDS AS PHOSPHODIESTERASE INHIBITORS<br/>[FR] NOUVEAUX COMPOSÉS SPIRO-[INDOLINE HETEROCYCLOALKANE] SUBSTITUÉS UTILISÉS COMME INHIBITEURS DE LA PHOSPHODIESTÉRASE
申请人:GRUENENTHAL GMBH
公开号:WO2017108204A1
公开(公告)日:2017-06-29
The invention relates to novel spiro-[indoline heterocycloalkane] compounds characterized in that the compound has general formula (I) in which the chemical groupings, substituents, variables and indices are as defined in the description, and to their use as medicaments, in particular as medicaments for the treatment of conditions and diseases that can be treated by inhibition of the PDE4 enzyme.
N-(Chloromethyloxycarbonyl)pyrrolidine as a source of the HOCH2− synthon
作者:Albert Guijarro、Miguel Yus
DOI:10.1016/0040-4039(96)01133-1
日期:1996.7
The reaction of N-(chloromethyloxycarbonyl)pyrrolidine (1) with lithium powder and a catalytic amount of DTBB (2.5 mol %) in the presence of different electrophiles [Me3SiCl, BujCHO, ButCHO, PhCHO, Et2CO, (CH2)5CO, PhCOMe, Ph2CO] in THF at −78°C leads, after hydrolysis with water, to the expected functionalised carbamates 2. Deprotection of the acetophenone derivative 2g with DIBALH at THF reflux yields
的反应Ñ(chloromethyloxycarbonyl)吡咯烷( - 1在不同的亲电子[我的存在锂粉末和DTBB催化量(2.5摩尔%))3的SiCl,卜Ĵ CHO,卜吨CHO,苯甲醛,等2 CO ,-(CH 2)5 CO,PhCOMe,Ph 2 CO]在THF中于-78°C水解后,可生成预期的官能化氨基甲酸酯2。在THF回流下,用DIBALH对苯乙酮衍生物2g进行脱保护,水解后得到相应的1,2-二醇3g。