T-type calcium channel blockers: spiro-piperidine azetidines and azetidinones—optimization, design and synthesis
作者:Elizabeth M. Smith、Steve Sorota、Hyunjin M. Kim、Brian A. McKittrick、Terry L. Nechuta、Chad Bennett、Chad Knutson、Duane A. Burnett、Jane Kieselgof、Zheng Tan、Diane Rindgen、Terry Bridal、Xiaoping Zhou、Yu-Ping Jia、Zoe Dong、Debbie Mullins、Xiaoping Zhang、Tony Priestley、Craig C. Correll、Deen Tulshian、Michael Czarniecki、William J. Greenlee
DOI:10.1016/j.bmcl.2010.06.012
日期:2010.8
A series of spiro-azetidines and azetidinones has been evaluated as novel blockers of the T-type calcium channel (CaV3.2) which is a new therapeutic target for the potential treatment of both inflammatory and neuropathic pain. Confirmation and optimization of the potency, selectivity and DMPK properties of leads will be described.
已经评估了一系列螺氮杂环丁烷和氮杂环丁酮作为T型钙通道(Ca V 3.2)的新型阻滞剂,它是潜在治疗炎性和神经性疼痛的新治疗靶标。将描述和验证潜在性,选择性和DMPK特性的优化。
Novel Dithia-aza-norbornanes as ‘Stiff’ Bicyclic Dithiazines
作者:Andrei G. Kutateladze、Alexei N. Kurchan、Edmir Wade
DOI:10.1055/s-2003-41431
日期:——
Addition of lithiated 4,5-dihydro-1,3,5-dithiazines to in situ generated N-silylimines in THF produces 2-(α-aminoalkyl)dithiazines, which rearrange into 3,5-dithia-1-azabicyclo[2.2.1]heptanes upon aqueous workup. These novel bicyclic dithiazines can in turn be lithiated at the position 4 and added to carbonyl compounds.
[3 + 2] Cycloadditions of Tertiary Amine <i>N</i>-Oxides and Silyl Imines as an Innovative Route to 1,2-Diamines
作者:Sarah L. Hejnosz、Danielle R. Beres、Alexander H. Cocolas、Martin J. Neal、Benjamin S. Musiak、Marianne M. B. Hanna、Aaron J. Bloomfield、Thomas D. Montgomery
DOI:10.1021/acs.orglett.3c01396
日期:2023.6.30
We have developed a one-pot synthetic method for producing 1,2-diamines from easily prepared and commercially available precursors through a formal umpolung process. Our method utilizes an efficient [3 + 2] cycloaddition as the key step in forming substituted 1,2-diamines in moderate to high yields. These resulting compounds can undergo subsequent transformations, demonstrating their utility as synthetic
Stereoselective synthesis of cis- and trans-.beta.-lactams via .alpha.-amino ester enolates and 1-aza-4-hetero-1,3-butadiene systems. Molecular structure of [cyclic] EtOC(O)C(H)(NEt2)C(H)(N(H)-tert-Bu)C(H):N(tert-Bu)ZnCl2: An unexpectedly isolated aldolate
作者:Fred H. Van der Steen、Henk Kleijn、Anthony L. Spek、Gerard Van Koten
DOI:10.1021/jo00020a031
日期:1991.9
Lithium and zinc enolates of N,N-diprotected glycine esters 1 react with 1-aza-4-hetero-1,3-butadiene systems 4 selectively affording cis- and trans-3-amino-4-functionalized-2-azetidinones in excellent yields, respectively. The reactions with 1,4-diaza-1,3-butadiene systems are far more selective (de greater-than-or-equal-to 90%) than those with 1-aza-4-oxo- and 1-aza-4-thio-1,3-butadiene systems (de 0-85%). In apolar solvents some of the reactions between the zinc enolates 2 and functionalized imines 4 partly stop at the stage of the C-C coupled product, probably because the metal center migrates to a chelating position between the nitrogen and the hetero atom of the imine. Consequently, elimination of the metal alkoxide and ring closure to a 2-azetidinone product is not likely to occur anymore. This view is supported by the isolation and structural characterization of a ZnCl2 complex of a C-C coupled product, erythro-EtOC(O)C(H)(NEt2)C(H) activated (N(H)-t-Bu)C(H) = N(t-Bu)ZnCl2 (8), which furthermore demonstrates that erythro C-C bond formation leads to a trans-2-azetidinone product. In polar solvents the migration of the metal center is prevented and exclusively 2-azetidinone products are isolated.