inhibition of the undesired Glaser coupling side reaction. The substratescope is broad, covering (hetero)aryl-, alkynyl-, and aminocarbonyl-substituted alkenes, (hetero)aryl and alkyl as well as silyl alkynes, and tertiary to primary alkyl radical precursors with excellent functional group compatibility. Facile transformations of the obtained chiral alkynes have also been demonstrated, highlighting
C2-Alkenylation of N-heteroaromatic compounds via Brønsted acid catalysis
作者:Giacomo E. M. Crisenza、Elizabeth M. Dauncey、John F. Bower
DOI:10.1039/c6ob00705h
日期:——
simple Brønsted acid catalysed union of diverse heteroarene N-oxides with alkenes. The approach is notable because (a) it is operationally simple, (b) the Brønsted acid catalyst is cheap, non-toxic and sustainable, (c) the N-oxide activator disappears during the reaction, and (d) water is the sole stoichiometric byproduct of the process. The new protocol offers orthogonal functional group tolerance to
cycloadducts in moderate diastereomeric excesses. The stereochemical course is dominated by the steric interactions at the two diastereomeric transition states. A computational study of these processes with structurally simpler reagents has been carried out. A concerted pathway via a highly asynchronous transition state is preferred for 2-unsubstituted 4-vinyl and 4-styrylthiazoles. However, two alternative
Electrophilic aromatic reactivities via pyrolysis of esters. Part 21. σ<sup>+</sup>Values for thiazole: the high polarisability of thiazole, and the effect of hydrogen bonding on the reactivity of N-containing heterocycles
作者:Ryan August、Carole Davis、Roger Taylor
DOI:10.1039/p29860001265
日期:——
values 0.93, 0.505, and –0.07. The positional reactivity order, and the reactivity relative to benzene, are correctly predicted by π-electron density calcuations. The reactivity of each position is substantially less than in solvolysis of the corresponding 1-aryl-1-chloroethanes, in contrast to the reactivity of thiophene which is closely similar in both pyrolysis and solvolysis reactions. Thiazole is thus
[EN] SUBSTITUTED HETEROCYCLICS WITH THERAPEUTIC ACTIVITY IN HIV<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES SUBSTITUÉS PRÉSENTANT UNE ACTIVITÉ THÉRAPEUTIQUE CONTRE LE VIH
申请人:NEW YORK BLOOD CENTER INC
公开号:WO2021102114A1
公开(公告)日:2021-05-27
Substituted heterocyclic substituted pyrrole carboxamide compounds such as those represented by Formula I or Formula II are provided herein. Such compounds, or pharmaceutically acceptable salts thereof, can be used in the treatment of HIV infection and related conditions.