An Ester Enolate–Claisen Rearrangement Route to Substituted 4-Alkylideneprolines. Studies toward a Definitive Structural Revision of Lucentamycin A
作者:Sujeewa Ranatunga、Jinsoo S. Kim、Ujjwal Pal、Juan R. Del Valle
DOI:10.1021/jo201727g
日期:2011.11.4
substituted α-allylglycine products with good to excellent diastereoselectivities. Resolution of dipeptide diastereomers and cyclization to form the pyrrolidine rings provide rapid access to stereopure prolyl dipeptides. We have applied this strategy to the synthesis of four Emp-containing isomers of lucentamycin A in pursuit of a definitive stereochemical revision of the naturalproduct. Our studies indicate
[EN] SUBSTITUTED TETRAHYDROFURAN ANALOGS AS MODULATORS OF SODIUM CHANNELS<br/>[FR] ANALOGUES DE TÉTRAHYDROFURANE SUBSTITUÉS UTILES EN TANT QUE MODULATEURS DE CANAUX SODIQUES
申请人:VERTEX PHARMA
公开号:WO2022256676A1
公开(公告)日:2022-12-08
Compounds of formula I, and pharmaceutically acceptable salts thereof, useful as inhibitors of sodium channels are provided. Also provided are pharmaceutical compositions comprising the compounds or pharmaceutically acceptable salts and methods of using the compounds, pharmaceutically acceptable salts, and pharmaceutical compositions in the treatment of various disorders, including pain.
Highly regioselective transformation of acyclic alpha,alpha'-alkenediols and their corresponding diacetates to monoacetates using lipase was accomplished. The acetylation of the alpha,alpha'-alkenediol regioselectively gave (E)-monoacetate, whereas the (Z)-monoacetate were obtained by hydrolysis of the alpha,alpha'-diacetate. (c) 2005 Elsevier Ltd. All rights reserved.
Tethered α-boryl radical cyclizations of haloalkyl boronates
作者:Robert A. Batey、David V. Smil
DOI:10.1016/s0040-4039(99)01970-x
日期:1999.12
Boroalkyl radicals readily cyclize onto alkenyl and alkynyl traps tethered via a C-B-O linkage. Oxidative cleavage-of the C-B bond of the temporary connection following cyclization affords 1,3-diols in good yields. (C) 1999 Elsevier Science Ltd. All rights reserved.
Crawford,R.J. et al., Canadian Journal of Chemistry, 1978, vol. 56, p. 992 - 997