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Selective hydrolysis

Chemically modified-CDs have also proven useful as organic enzyme mimics (10). Modified CDs have catalyzed the de-esterification, hydrolysis, selective substitution, addition and isomerization of a variety of molecules (9). Advances in the chemical s3mthesis of CDs (11) and unusual "manno" CDs (12) promise novel new CD-like materials in the future. [Pg.373]

Enantiomerically pure compound was obtained by recrystallization of the corresponding p-nitrobenzoyl ester 36 in 78% yield. After hydrolysis, selective protection of the diol, reductive debenzylation using lithium di-t-butyl biphenylide (LiDBB), and TPAP-catalyzed oxidation gave aldehyde 27. [Pg.357]

As shown, besides hydrolysis, selective O-acylations are feasible (113)1... [Pg.118]

The 1,2-0-isopropylidene derivative 100, derived from L-sorbose, was also used for the synthesis of 1-deoxynojirimycin (2) (Scheme 19) It was prepared from L-sorbose by reaction with 2,2-dimethoxypropane in the presence of stannous chloride, followed by acid hydrolysis. Selective sulfonylation of the primary hydroxyl group with 2,4,6-triisopropylbenzenesulfonyl chloride (TIBSCl) in a 1 1 mixture of triethylamine and pyridine followed by nncleophilic displacement with azide ion in DMF afforded the 6-azido-... [Pg.118]

A highly selective ring opening of 6-azabicyclo[3.2.0]hept-3-en-7-one (45) was achieved by using a whole cell preparation of ENZA-1 (Rhodococcus equi) [20, 86, 87]. The hydrolysis selectively gave the amino acid 46, which was converted directly to the ester acetamide 47. The recovered lactam 48 was reduced to 49. This was hydrolysed to 5, which displayed a similar optical rotation to that of natural cispentacin (Scheme 7). It is worthy of mention that ENZA-1 exhibited only poor hydrolytic activity towards ( )-49. [Pg.282]

Effect of carbon-carbon double bonds on hydrolysis Selective ester cleavage s. 24, 30... [Pg.15]

This procedure has been applied to the preparation of a key intermediate in the industrial synthesis of diltiazem, a drug used to treat hypertension, angina, and arrythmia. In this case, the racemic reactant is a methyl ester, and lipase-catalyzed hydrolysis selectively... [Pg.292]

See other pages where Selective hydrolysis is mentioned: [Pg.27]    [Pg.182]    [Pg.67]    [Pg.210]    [Pg.386]    [Pg.64]    [Pg.370]    [Pg.1059]    [Pg.182]    [Pg.68]    [Pg.83]    [Pg.12]    [Pg.319]    [Pg.44]    [Pg.48]    [Pg.346]    [Pg.248]    [Pg.271]    [Pg.302]    [Pg.303]    [Pg.157]    [Pg.242]   
See also in sourсe #XX -- [ Pg.24 , Pg.25 , Pg.26 , Pg.27 , Pg.28 , Pg.29 , Pg.30 , Pg.31 , Pg.32 , Pg.33 , Pg.34 , Pg.35 , Pg.36 , Pg.37 ]



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Acetates, selective hydrolysis

Arabinose selective hydrolysis

Epoxide hydrolysis, selective

Herbicide selectivity hydrolysis

Hydrolysis enantiotopically selective

Hydrolysis enzymic, selective

Hydrolysis selective toxicity

Hydrolysis site-selective protein cleavage

Hydrolysis, enantiomer-selective

Hydrolysis, selective enzymatic

Mannitol selective hydrolysis

Mannopyranosides selective hydrolysis

Methyl ester hydrolysis, selectivity

Peptide hydrolysis site-selective protein cleavage

Peptide hydrolysis, selective

Phosphoramidates hydrolysis, selective

Selected hydrolysis concept

Selective Hydrolysis Methods

Selective hydrolysis position

Selective reaction hydrolysis

Xylose selective hydrolysis

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