First synthesis of (1S,2S)- and (1R,2R)-1-amino-2-isopropylcyclobutanecarboxylic acids by asymmetric Strecker reaction from 2-substituted cyclobutanones
摘要:
An efficient and easy one-pot reaction from readily available racemic 2-substituted cyclobutanones gave, by means of asymmetric Strecker synthesis in the presence of an amine chiral auxiliary, two major aminonitriles with excellent diastereoselectivity. After separation, the major cis-aminonitriles were hydrolysed and hydrogenolysed to lead for the first time to pure non-racemic (+)-1-amino-2-isopropylcyclobutanecarboxylic acid (ACBC) and its antipode. (C) 2003 Elsevier Science Ltd. All rights reserved.
Disclosed herein are pyrazole glucokinase activators of the formula (I)
useful for the treatment of metabolic diseases and disorders, preferably diabetes mellitus.
本文披露了一种式(I)的吡唑葡萄糖激酶激活剂,用于治疗代谢性疾病和紊乱,最好是糖尿病。
A Novel Route to Geminal Dibromocyclobutanes: Syntheses of 2-Substituted Cyclobutanone Acetals and Their Reaction with Boron Tribromide
作者:Tore Nordvik、Udo H. Brinker
DOI:10.1021/jo035295o
日期:2003.11.1
Nine 2-substituted cyclobutanone acetals, in addition to the parent cyclobutanone acetal, were synthesized from their corresponding cyclobutanones and subsequently treated with boron tribromide. The substituents were either alkyl chains or a phenyl and a benzyl group, respectively. The major compounds obtained in these reactions were, in most cases, the geminal dibromocyclobutanes which were obtained
Organic synthesis using a hypervalent iodine reagent: unexpected and novel domino reaction leading to spiro cyclohexadienone lactones
作者:Hiromichi Fujioka、Hideyuki Komatsu、Taeko Nakamura、Akihito Miyoshi、Kayoko Hata、Jnashuara Ganesh、Kenichi Murai、Yasuyuki Kita
DOI:10.1039/b925687c
日期:——
The reaction of 1-(p-hydroxyaryl)cyclobutanols and phenyl iodide(III) diacetate in hexafluoroisopropanol and water produced spiro cyclohexadienone lactones via a domino reaction.
Metalloprotease inhibitors containing a heterocyclic moiety
申请人:Gege Christian
公开号:US20080221091A1
公开(公告)日:2008-09-11
The present invention relates generally to pharmaceutical agents containing a heterocyclic moiety, and in particular, to heterocyclic metalloprotease inhibiting compounds. More particularly, the present invention provides a new class of heterocyclic MMP-13 inhibiting compounds with a modified benzoxazine moiety, that exhibit an increased potency and selectivity in relation to currently known MMP-13 inhibitors.
Synthetic Studies toward Halichlorine: Complex Azaspirocycle Formation with Use of an NBS-Promoted Semipinacol Reaction
作者:Paul B. Hurley、Gregory R. Dake
DOI:10.1021/jo800336k
日期:2008.6.1
The investigations of a synthetic route incorporating a NBS-promoted semipinacol rearrangement to the 6-azaspiro[4.5]decane fragment within halichlorine (1) are presented. A convergent approach was pursued, utilizing two chiral, enantiomerically enriched building blocks, 2-trimethylstannyl piperidene 10 and substituted cyclobutanone 19. Noteworthy synthetic operations in this study include the following: