A hydrolysis method for tert-butyl ester in gadolinium-based contrast agent comprises hydrolyzing the tert-butyl ester with a catalyst. The preparation method of the catalyst comprises the following steps: subjecting zirconia and titanium tetrachloride to reaction in the presence of sulfuric acid and ...
Subsequent deprotection of the 1,2-syn-2,3-anti-3-alkyl-β-amino esters (alkyl = Et, Bn,iPr) by hydrogenolysis and ester hydrolysis gives the corresponding 1,2-syn-2,3-anti-3-alkylcispentacins in >98% de and 98 ± 1% ee. Selective epimerisation of the 1,2-syn-2,3-anti-3-...
K Kishore, JA Sattigeri, S Sethi - US Patent 7, 671 - www.google.com 2,2-dimethyl-{11 -aryloxy-alkanoic acids and salts and esters thereof. Apr 7, 1970, Feb 13, 1973,Sumitomo Chem Co Ltd,Ja, Phenoxy carboxylic acid derivative. US3781328, Sep 7, 1972, Dec25, 1973, Boehringer ...
Hydrolyzes in water to tert-butyl alcohol and acetic acid. The estimated hydrolysis half-life at 25 °C and pH 7 is 140 yr (Mabey and Mill, 1978). storage tert-Butyl acetate should be stored in a cool, dry, well-ventilated area in tightly sealed containers that are labeled in ...
Catalytic hydrogenation followed by hydrolysis of the acetate by treatment of 0.5 N NaOH gave (+)-241D (13). Similarly, 6-epi-(+)-241D (42) was synthesized from 41 (Scheme 3). Sign in to download full-size image Scheme 3. Synthesis of (+)-241D (13) using Ir-catalyzed allylic ...
(tert-Butoxycarbonyl)phenylalanine; 6: PN: RU2506269 PAGE: 13 claimed sequence; Alanine, N-carboxy-3-phenyl-, N-tert-butyl ester, L-; Alanine,N-carboxy-3-phenyl-, N-tert-butyl ester, L- (8CI); BOC-L-Phenylalanine; BOC-L-Phe-OH; Boc-Phe-OH; L-Phenylalanine, N-[(1,1-di...
ChemInform Abstract: TEMPERATURE DEPENDENCE OF ACTIVATION PARAMETERS IN THE NEUTRAL ESTER HYDROLYSIS IN TERT-BUTYL ALCOHOL-WATER SOLUTIONSesterification, ester hydrolysisdoi:10.1002/chin.198402124KANERVAL. TChemischer Informationsdienst
Common Name tert-Butylisocyanate CAS Number 1609-86-5 Molecular Weight 99.13110 Density 0.868 g/mL at 25 °C(lit.) Boiling Point 85-86 °C(lit.) Molecular Formula C5H9NO Melting Point <-25ºC MSDS Chinese USA Flash Point 24 °F Symbol GHS02, GHS05, GHS06, GHS08Signal Word...
英文别名trans-(2-Hydroxy-cyclopentyl)-carbamic acid tert-butyl ester | MFCD11656038 | t-Butyl N-[(1S,2S)-2-hydroxycyclopentyl]carbamate | EN300-60738 | P17090 | AMY1204 | Carbamic acid, N-[(1S,2S)-2-hydroxycyclopentyl]-, 1,1-dimethylethyl ester | tert-Butyl((1S,2 ...
Characterized in that: the compound IV as a raw material, under alkaline conditions, and di-tert-butyl ester; and then in the role of a base, and N- fluoro double benzenesulfonamide occur fluorinated reaction intermediate. 中间体在碱性条件发生水解反应即得(I). Intermediate hydrolysis reaction ...