Aliphatic amino azides as key building blocks for efficient polyamine syntheses
摘要:
New routes to open-chain polyamines have been developed using aliphatic amino azides as common precursors for the construction of the carbon-nitrogen framework. These alpha,omega-diaminoalkane synthetic equivalents were combined with (omega-halogenoalkyl)dichloroboranes to extend the polyamine chain from the azido moiety. An extension from the free amino group can also be achieved via a Michael type addition with acrylonitrile or a reductive amination with a gamma-azido ketone. Further transformations led to a large variety of regioselectively C- or (and) N-substituted polyamines.
Silylative reduction of nitriles was studied under transition metal-free conditions by using B(C6F5)3 as a catalyst with hydrosilanes as a reductant. Alkyl and (hetero)aryl nitriles were efficiently converted to primaryamines or imines under mild conditions. The choice of silanes was found to determine the selectivity: while a full reduction of nitriles was highly facile, the use of sterically bulky
在无过渡金属的条件下,通过使用B(C 6 F 5)3作为催化剂,以氢硅烷作为还原剂,研究了腈的甲硅烷基化还原反应。在温和的条件下,烷基和(杂)芳基腈被有效地转化为伯胺或亚胺。发现硅烷的选择决定了选择性:虽然腈的完全还原非常容易,但是使用空间大体积的硅烷允许部分还原,从而生成N-甲硅烷基亚胺。
[EN] BIARYL COMPOUNDS USEFUL AS IMMUNOMODULATORS<br/>[FR] COMPOSÉS BIARYLES UTILES EN TANT QU'IMMUNOMODULATEURS
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2018044963A1
公开(公告)日:2018-03-08
The present disclosure generally relates to compounds useful as immunomodulators. Provided herein are compounds, compositions comprising such compounds, and methods of their use. The disclosure further pertains to pharmaceutical compositions comprising at least one compound according to the disclosure that are useful for the treatment of various diseases, including cancer and infectious diseases.
A method for remote radical C–H alkynylation at unactivated sites is reported. C–Hfunctionalization proceeds via 1,5-hydrogen atom transfer (HAT) to amidyl radicals that are generated via an addition/fragmentation reaction. The readily installed N-allylsulfonyl moiety is used as a precursor of the N-centered radical. Unactivated secondary and tertiary as well as selected primary C–H bonds can be functionalized
[EN] AMINO-SUBSTITUTED-ALKYLOXY-BENZO[E]PYRIDO[4,3-B]INDOLE DERIVATIVES AS NEW POTENT KINASE INHIBITORS<br/>[FR] DÉRIVÉS D'ALKYLOXY-BENZO[E]PYRIDO[4,3-B]INDOLE SUBSTITUÉS PAR UN AMINO À TITRE DE NOUVEAUX PUISSANTS INHIBITEURS DE KINASES
申请人:INST CURIE
公开号:WO2012163933A1
公开(公告)日:2012-12-06
The present invention relates to a new class of benzo[e] pyrido- indole, the amino- substituted-alkyloxy-benzo [e] pyrido [4, 3 -b] indole derivatives of formula (I), having a particular kinase inhibition profile and useful as a therapeutic agent, in particular an anti - tumoralagent. wherein the cycle A, R1, R2, R3, R4 and R5 are as defined in the claims.
PhNH-functionalized dienes are copolymerized efficiently with butadiene to stereoregular copolymers by [(mesitylene)Ni(allyl)][BArF4] (Ni-1). Overall polymerization rates and comonomer incorporations depend strongly on the linker length between the diene moiety and functional group, in, e.g., PhS-(CH2)xC(═CH2)-CH═CH2 (PhS-x-BD, x = 3-7), in particular for certain linker lengths high comonomer reactivity ratios stand