Generation of 6-(Trifluoromethyl)-4,5-dihydro-2(3H)-pyridone and the Application to Synthesis of Some Fused Nitrogen Heterocycles Carrying a Trifluoromethyl Group on the Bridgehead Position via Radical Cyclization of Dihydropyridones
摘要:
Staudinger/aza-Wittig reaction of 6,6,6-trifluoro-5-oxohexanoyl azide with PPh(3) or PBu(3) was examined. A reactive intermediate acyl imine 1 was trapped by methanol. Without nucleophile, isomerized enamide form 3 was obtained. N-Iodobenzoylation and N-haloalkylation of 3 and following radical cyclization via the 5-exo or g-exo mode gave benzoindolizidinone, indolizidinone, and quinolizidinone derivatives 10-14, which have a trifluoromethyl group at the bridgehead position adjacent to nitrogen. Although LiAlH4 reduction of 10 and 11 gave a mixture of saturated benzoindolizidine 15 and amino alcohol 16, reduction with BH3/THF selectively gave the desired 15 and indolizidine 17 from 13.
[EN] PYRANO[4,3-B]L NDOLE DERIVATIVES AS ALPHA-1 -ANTITRYPSIN MODULATORS FOR TREATING ALPHA-1 -ANTITRYPSIN DEFICIENCY (AATD)<br/>[FR] DÉRIVÉS DE PYRANO [4,3-B] INDOLE EN TANT QUE MODULATEURS D'ALPHA-1-ANTITRYPSINE POUR TRAITER UNE DÉFICIENCE EN ALPHA-1-ANTITRYPSINE (AATD)
申请人:VERTEX PHARMA
公开号:WO2021203014A1
公开(公告)日:2021-10-07
Pyrano[4,3-b]indole derivatives as alpha-1-antitrypsin modulators for treating alpha-1-antitrypsin deficiency (AATD)
Synthesis of enantiopure α-Tfm-proline and α-Tfm-pipecolic acid from oxazolo-pyrrolidines and -piperidines
作者:Clément A. Sanchez、Charlène Gadais、Sitan Diarra、Andrea Bordessa、Nathalie Lensen、Evelyne Chelain、Thierry Brigaud
DOI:10.1039/d1ob01173a
日期:——
and α-Tfm-pipecolic acid were synthesized starting from commercially available diesters and ethyltrifluoroacetate. A Strecker type reaction on intermediate chiral Tfm-oxazolo-pyrrolidine and -piperidine provided the corresponding nitrile precursor of enantiopure (R) and (S) α-Tfm-proline and α-Tfm-pipecolic acid. The C-terminal peptide coupling reaction of α-Tfm-pipecolic acid has been successfully
对映体纯 α-Tfm-脯氨酸和 α-Tfm-哌啶酸是从市售的二酯和三氟乙酸乙酯开始合成的。中间体手性 Tfm-恶唑并吡咯烷和哌啶的 Strecker 型反应提供了相应的对映体纯 ( R ) 和 ( S ) α-Tfm-脯氨酸和 α-Tfm-哌啶酸的腈前体。成功实现了α-Tfm-哌啶酸的C端肽偶联反应。
Asymmetric Synthesis of Chiral, Nonracemic Trifluoromethyl-Substituted Piperidines and Decahydroquinolines
作者:Jinlong Jiang、Robert J. DeVita、George A. Doss、Mark T. Goulet、Matthew J. Wyvratt