Process Development in the Synthesis of the ACE Intermediate MDL 28,726
摘要:
MDL 28,726 is a key intermediate in the synthesis of the ACE inhibitors MDL 27,210A and MDL 100,240, An efficient nine-step synthesis of this tricyclic acid, which has three chiral centers, was developed beginning with 3,4-dihydro-2H-pyran. A key step in the synthesis features an enzyme-catalyzed resolution of the lithium salt of the N-trifluoroacetamide of (R,S)-6-hydroxynorleucine. All of the steps were optimized and completed in reactor equipment using environmentally acceptable processes. Process development of this route is described.
Process Development in the Synthesis of the ACE Intermediate MDL 28,726
摘要:
MDL 28,726 is a key intermediate in the synthesis of the ACE inhibitors MDL 27,210A and MDL 100,240, An efficient nine-step synthesis of this tricyclic acid, which has three chiral centers, was developed beginning with 3,4-dihydro-2H-pyran. A key step in the synthesis features an enzyme-catalyzed resolution of the lithium salt of the N-trifluoroacetamide of (R,S)-6-hydroxynorleucine. All of the steps were optimized and completed in reactor equipment using environmentally acceptable processes. Process development of this route is described.
Macrocyclic cysteine protease inhibitors and compositions thereof
申请人:Lincoln University
公开号:US09434762B2
公开(公告)日:2016-09-06
The present invention provides a novel class of macrocyclic compounds, which are useful as cysteine protease inhibitors. Also provided are novel intermediates and methods of preparing the compounds. The invention also provides pharmaceutical compositions comprising the compounds. The compounds and compositions are useful in methods of treating or preventing one or more diseases associated with cysteine protease activity, particularly those associated with calpain activity.
Macrocyclic Cysteine Protease Inhibitors and Compositions Thereof
申请人:Abell Andrew David
公开号:US20110021434A1
公开(公告)日:2011-01-27
The present invention provides a novel class of macrocyclic compounds, which are useful as cysteine protease inhibitors. Also provided are novel intermediates and methods of preparing the compounds. The invention also provides pharmaceutical compositions comprising the compounds. The compounds and compositions are useful in methods of treating or preventing one or more diseases associated with cysteine protease activity, particularly those associated with calpain activity.
SYNTHESIS OF (<i>S</i>)-(−)-1-[(9-FLUORENYLMETHOXYCARBONYL)AMINO-5-CARBOXYPENTYL]-3-HYDROXYPYRIDINIUM TRIFLUOROACETATE
作者:Maciej Adamczyk、Rajarathnam E. Reddy
DOI:10.1080/00304940009355922
日期:2000.6
Derivatives of (X)-(-)1-(amino-5-carboxypentyl]-3-hydroxypyridinium salt 1 are present in bone collagen and play an important role in maintaining the integrity of this tissue.’.’ The synthesis of racemic (k)-l starting from tert-butyl-(2-tert-butoxycarbonyl)amino acetate has been reported previously.’ We present here the preparation of an important chiral buildingblock, 0)-(-)-Fmoc derivative of 1 (compound
An amino acid derivative having an angiotensin I-converting enzyme inhibitor activity, a vasopressin antagonism and an atrial natriuretic peptide hydrolase inhibitor activity, and represented by general formula (I) wherein R¹ represents hydrogen or acyl; R² represents hydrogen, lower alkyl, cycloalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl or optionally substituted heteroarylalkyl; m and n represent each independently an integer of 0.1 or 2; and J represents a cyclic group having an angiotensin I-converting enzyme inhibitor activity.
A novel three-step hydroxy-deamination sequence: Conversion of lysine to 6-hydroxynorleucine derivatives
作者:C.Richard Nevill、Paul T. Angell
DOI:10.1016/s0040-4039(98)01142-3
日期:1998.8
Oxidation of carbamates with catalytic RuO4, generated from RuO4, and NaBrO3, provides the corresponding acyl carbamates, which can be reduced with NaBH4 to provide alcohols. Application of this methodology to L-lysine provides (S)-6-hydroxynorleucine derivatives. (C) 1998 Elsevier Science Ltd. All rights reserved.