Pump it up! The sluggish reactivity of organozinc reagents in additions to aldehydes, ketones, and CO2 can be increased by MgCl2, which is usually generated in the preparation of the zinc reagent. The direct reaction with CO2, in particular, opens an expeditious route to phenylacetic acid derivatives, as demonstrated in a short synthesis of ibuprofen (see scheme).
High yielding alkylations of unactivated sp<sup>3</sup>and sp<sup>2</sup>centres with alkyl-9-BBN reagents using an NHC-based catalyst: Pd-PEPPSI-IPr
作者:Cory Valente、Sylvia Baglione、David Candito、Christopher J. O'Brien、Michael G. Organ
DOI:10.1039/b715081d
日期:——
High yielding, room temperature cross couplings of unactivated alkyl bromides and aryl bromides/chlorides with alkyl-9-BBN reagents has been achieved using an NHC-based catalyst (Pd-PEPPSI-IPr) via a general, functional-group tolerant and easily implemented protocol.
A cobalt-catalyzed cross-coupling betweenalkyl iodides and cyclopropyl, cyclobutyl, and alkenyl Grignard reagents is disclosed. The reaction allows the introduction of strained rings on a large panel of primary and secondary alkyl iodides. The catalytic system is simple and nonexpensive, and the reaction is general, chemoselective, and diastereoconvergent. The alkene resulting from the cross-coupling
The invention encompasses a series bicyclic pyrimidinone compounds of Formula I which inhibit HIV integrase and prevent viral integration into human DNA. This action makes the compounds useful for treating HIV infection and AIDS. The invention also encompasses pharmaceutical compositions and methods for treating those infected with HIV.
Photoredox Catalysis Enables Access to <i>N</i>-Functionalized 2,1-Borazaronaphthalenes
作者:Xie Wang、Geraint H. M. Davies、Adriel Koschitzky、Steven R. Wisniewski、Christopher B. Kelly、Gary A. Molander
DOI:10.1021/acs.orglett.9b00884
日期:2019.4.19
The synthesis and utilization of a class of 2,1-borazaronaphthyltrifluoroborate reagents that provide a general solution to the challenge of N-functionalization of the 2,1-borazaronaphthalene core is described. By adorning the nitrogen of this core with a trifluoroboratomethyl unit, a suite of odd-electron processes can be executed, installing motifs that would otherwise be inaccessible using a two-electron