65632-62-4Relevant academic research and scientific papers
A scalable process to the key intermediate of cilazapril, (S)-1-benzyloxycarbonylhexahydropyridazine-3-carboxylic acid, through a novel cascade course
Chen, Yu,Lu, Yuwei,Zou, Qing,Chen, Huansheng,Ma, Dawei
, p. 1209 - 1213 (2013)
A novel and efficient manufacturing technology is disclosed in the present work for the preparation of (S)-1-benzyloxycarbonylhexahydropyridazine-3- carboxylic acid, which is a key intermediate of cilazapril. The whole process includes only three steps; the first two steps were conducted in one pot, followed by a novel selective removal of a Cbz group in a cascade course.
Total synthesis and structure elucidation of JBIR-39: A linear hexapeptide possessing piperazic acid and γ-hydroxypiperazic acid residues
Yoshida, Masahito,Sekioka, Naoki,Izumikawa, Miho,Kozone, Ikuko,Takagi, Motoki,Shin-ya, Kazuo,Doi, Takayuki
supporting information, p. 3031 - 3041 (2015/02/05)
The total synthesis and stereochemical structural elucidation of JBIR-39, containing four nonproteinogenic piperazic acid (Piz) residues, is reported. The synthesis includes Sc(OTf)3-catalyzed acylation of a Piz(γ-OTBS) derivative with piperazi
Stereochemical Definition and Chirospecific Synthesis of the Peptide Deformylase Inhibitor Sch 382583
Coats, Reed A.,Lee, Sheng-Lian,Davis, Kari A.,Patel, Kanu M.,Rhoads, Elaine K.,Howard, Michael H.
, p. 1734 - 1737 (2007/10/03)
The recently reported natural product Sch 382583 (1), an inhibitor of peptide deformylase, has been synthesized in 16 steps from commercially available starting materials. The three chiral centers were set by a combination of chiral auxiliary and chiral p
An efficient stereoselective synthesis of [3S(1S,9S)]-3-[[[9- (benzoylamino)octahydro-6,10-dioxo-6H-pyridazino-(1,2-a)(1,2)-diazepin-1- yl]-carbonyl]amino]-4-oxobutanoic acid, an interleukin converting enzyme (ICE) inhibitor
Chen,Goel,Hyun,Magano,Rubin
, p. 1587 - 1592 (2007/10/03)
The title compound 1 is a potent interleukin-1β-converting enzyme (ICE) inhibitor. Recently, an efficient chiral synthesis of compound 1 has been accomplished in our labs. The overall yield of this 18-step stereoselective synthesis was 9.8%.
Enantioselective syntheses of (R)- and (S)-hexahydropyridazine-3-carboxylic acid derivatives
Schmidt, Ulrich,Braun, Christine,Sutoris, Heinz
, p. 223 - 229 (2007/10/03)
Appropriately protected optically active tetrahydropyridazine-3-carboxylic acid and hexahydropyridazine-3-carboxylic acid were prepared via ring closure of α-hydrazino- and δ-hydrazinopentanoates. Either optically active glutamic acid or an enantioselective catalytic hydrogenation was used to generate the chiral center. The numerous optically active intermediates are valuable starting materials for the synthesis of other unusual amino acids.
