Organochromium complexes as catalysts for the carboalumination of unactivated terminal olefins
摘要:
将铝烷基添加到末端烯烃中可生成支链有机铝化合物,并可将其转化为功能化烷烃。供体功能化的 Cp-铬(III)络合物可有效催化这一碳铝化反应。活性催化剂是由二氯化铬(III)前体与 MAO 或三烷基铝与 N,N-二甲基苯胺四四氟苯硼酸盐的混合物活化而成。伯氨基烯会使催化剂失活,而仲氨基烯和叔氨基烯也会被碳铝化。
Blocking toll-like receptor 9 signaling with small molecule antagonist
申请人:Council of Scientific & Industrial Research
公开号:US10662177B2
公开(公告)日:2020-05-26
The present invention relates to small molecule 4-(piperazin-1-yl)quinazolin-2-amino compounds with formula (I) useful for inhibiting signalling by certain toll-like receptors (TLRs), especially TLR9. Toll-like receptors (TLRs) are members of the larger family of evolutionarily conserved pattern recognition receptors which are critical first line of defense for self-nonself discrimination by the host immune response. Aberrant TLR9 activation is implicated in autoreactive inflammation in different autoimmune diseases. The invention depicts compounds with formula (I), composition and methods can be used in a number of clinical applications, including as pharmaceutical agents and methods for treating conditions involving unwanted immune activity due to TLR9 activation.
The addition of aluminium alkyls to terminal olefins leads to branched organoaluminium compounds which can be converted into functionalised alkanes. This carboalumination reaction is efficiently catalysed by a donor functionalised Cp-chromium(III) complex. The active catalyst is obtained by activation of the chromium(III) dichloride precursor with MAO or with a mixture of trialkylaluminium and N,N-dimethylanilinium tetrakispentaflourphenylborate. Primary aminoalkenes deactivate the catalyst whereas secondary and tertiary aminoalkenes can also be carboaluminated.
将铝烷基添加到末端烯烃中可生成支链有机铝化合物,并可将其转化为功能化烷烃。供体功能化的 Cp-铬(III)络合物可有效催化这一碳铝化反应。活性催化剂是由二氯化铬(III)前体与 MAO 或三烷基铝与 N,N-二甲基苯胺四四氟苯硼酸盐的混合物活化而成。伯氨基烯会使催化剂失活,而仲氨基烯和叔氨基烯也会被碳铝化。