95582-17-5Relevant articles and documents
Rapid and Mild Lactamization Using Highly Electrophilic Triphosgene in a Microflow Reactor
Fuse, Shinichiro,Komuro, Keiji,Otake, Yuma,Masui, Hisashi,Nakamura, Hiroyuki
supporting information, p. 7525 - 7532 (2021/03/17)
Lactams are cyclic amides that are indispensable as drugs and as drug candidates. Conventional lactamization includes acid-mediated and coupling-agent-mediated approaches that suffer from narrow substrate scope, much waste, and/or high cost. Inexpensive, less-wasteful approaches mediated by highly electrophilic reagents are attractive, but there is an imminent risk of side reactions. Herein, a methods using highly electrophilic triphosgene in a microflow reactor that accomplishes rapid (0.5–10 s), mild, inexpensive, and less-wasteful lactamization are described. Methods A and B, which use N-methylmorpholine and N-methylimidazole, respectively, were developed. Various lactams and a cyclic peptide containing acid- and/or heat-labile functional groups were synthesized in good to high yields without the need for tedious purification. Undesired reactions were successfully suppressed, and the risk of handling triphosgene was minimized by the use of microflow technology.
Development of a large-scale synthesis of sulphostin, a dipeptidyl peptidase IV inhibitor
Abe, Masatoshi,Nagai, Masashi,Yamamoto, Keiichiro,Yamazaki, Hiroko,Koga, Ichiro,Satoh, Yoshitaka,Muraoka, Yasuhiko,Kurashige, Shuji,Ichikawa, Yuh-Ichiro
, p. 570 - 576 (2012/12/25)
For the progress of the in vivo study on sulphostin, a dipeptidyl peptidase IV inhibitor, its large-scale synthetic method was investigated. The optical resolution of (3S,RSP)-1-amino(sulfoamino)phosphinyl-3- benzyloxycarbonylamino-2-piperidinone, which was the most difficult step in the previous method, was simplified by using fractional crystallization. The use of 2 mol equiv of (1S,2R)-(+)-2-amino-1,2-diphenylethanol for optical resolution gave desired diastereomer 15 in good yield as a less soluble salt. In the present synthetic method, there were no requirements for purification using column chromatography, reaction at cryogenic temperature, and treatment using the haloalkane solvents. The total yield of the new method was 4.6%, which was an improvement of approximately 2-fold compared to the method reported previously.
Sulfonamide lactam inhibitors of FXa and method
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Page 22; 27-28, (2010/02/08)
Sulfonamide lactams of the following formula wherein X, R1, R2, R3, R4, R4a, R5, R5a, R6, R6a, R7 and R8 are as described herein, are provided which inhibitors of Factor Xa and are useful as anticoagulants in the treatment of cardiovascular diseases associated with thromboses.
First synthesis and determination of the absolute configuration of sulphostin, a novel inhibitor of dipeptidyl peptidase IV
Abe, Masatoshi,Akiyama, Tetsuo,Nakamura, Hikaru,Kojima, Fukiko,Harada, Shigeko,Muraoka, Yasuhiko
, p. 999 - 1004 (2007/10/03)
Sulphostin, a novel dipeptidyl peptidase IV (DPP-IV) inhibitor, was isolated from the culture broth of Streptomyces sp. MK251-43F3. Determination of the absolute configurations of two asymmetric atoms using the natural product was not achieved due to the small amount of the compound obtained. We synthesized four possible stereoisomers of sulphostin from D- or L-ornithine and compared their physicochemical and biological data to naturally isolated sulphostin. As a result, the absolute configurations at C-3 and the phosphorus atom of sulphostin were determined to be S and R, respectively, by X-ray crystallography. Synthetic sulphostin and its C-3 epimer have strong inhibitory activities against DPP-IV, IC50 values of which are 6.0 and 8.9 ng/mL, respectively. Thus it appears that the configuration of the phosphorus atom is primarily responsible for the activity; in contrast, the configuration of C-3 does not appear to affect the activity.
Serine protease inhibitors
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, (2008/06/13)
The invention relates to a compound having the formula (I): R1SO2—B—X—Z—C(O)—Y, B is a bond, an amino acid of the formula —NR—CH[(CH2)pC(O)OH]—C(O)— or an ester derivative thereof wherein p is 1, 2, or 3, Gly, D-1-Piq, D-3-Piq, D-1-Tiq, D-3-Tiq, D-Atc, Aic, or a L- or D-amino acid having a hydrophobic, basic or neutral side chain; X is an amino acid with a hydrophobic side chain, glutamine, serine, theronine, a cyclic amino acid optionally containing an additional heteroatom selected from N, O or S, and optionally substituted with (1-6C)alkyl, (1-6C)alkoxy, benzyloxy or oxo, or X is 2-amino-isobutyric acid, —NR2—CH2—C(O)— or the fragment (I) or (II), wherein n is 2, 3, or 4, W is CH or N and R3is H, (1-6C)alkyl or phenyl which groups may optionally be substituted with hydroxy, (1-6C)alkoxy, COOH, COO(1-6C)alkyl, CONH2, or halogen; Z is lysine or 4-aminocyclohexylglycine. The compounds of the invention have anticoagulant activity and can be used in treating or preventing thrombin-related diseases. The variable R1and Y are defined in claim 1.
Sulphostin analogue and process for producing sulphostin and its analogue
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, (2008/06/13)
A sulphostin analogue represented by the general formula, wherein n is an integer of from 0 to 3, provided that a case where n is 2 and steric configurations of C* and P* are S and R, respectively, is excluded, or a pharmaceutically acceptable salt thereof.
SULPHOSTIN ANALOGUES AND PROCESSES FOR THE PREPARATION OF SULPHOSTIN AND ANALOGUES THEREOF
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Example 1, (2008/06/13)
A sulphostin analogue represented by the general formula, wherein n is an integer of from 0 to 3, provided that a case where n is 2 and steric configurations of C* and P* are S and R, respeetively, is excluded, or a pharmaceutically acceptable salt thereof.
CERTAIN 3-PHOSPHINYL-AMINO-2-OXO-1H-AZEPINE-1-ACETIC ACID DERIVATIVES HAVING ANTI-HYPERTENSIVE ACTIVITY
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, (2008/06/13)
Phosphonamide substituted lactams of the formula STR1 are disclosed. These compounds are useful as hypotensive agents.
