Enone structure as a probe to Lewis acid carbonyl binding in copper-catalysed asymmetric conjugate addition
摘要:
Systematic changes in the substitution pattern of linear enones ((RCOCH)-C-1=CHR2) helps identify the reactive conformation (s-trans versus s-cis) of the enone in copper-catalysed asymmetric 1,4-ZnEt2 addition. Pointers to the binding mode of the Lewis Acid (syn or anti to the 'ene' function) are also gathered. Enantioselectivities of up to 79% have been realised in these reactions. (C) 2000 Elsevier Science Ltd. All rights reserved.
The present invention provides compounds, pharmaceutically acceptable compositions thereof, and methods of using the same.
本发明提供了化合物、药学上可接受的组合物以及使用它们的方法。
ALGORITHM FOR DESIGNING IRREVERSIBLE INHIBITORS
申请人:Singh Juswinder
公开号:US20100185419A1
公开(公告)日:2010-07-22
The invention is an algorithm and method for designing an inhibitor that covalently binds a target polypeptide. The algorithm and method can be used to rapidly and efficiently convert reversible inhibitors into irreversible inhibitors.
Fused-ring alkane fuel and photocatalytic preparation process thereof
申请人:TIANJIN UNIVERSITY
公开号:US20200181040A1
公开(公告)日:2020-06-11
A process for preparing a fused-ring alkane fuel, wherein the fused-ring alkane fuel has the following structure:
wherein n is 1 or 2; R
1
, R
2
, R
3
, R
4
and R
5
are H or —CH
3
or —CH
2
CH
3
;
the fused-ring alkane fuel has a density of greater than 0.870 g/cm
3
, a freezing point of not higher than −50° C., and a net mass heat value of not less than 42.0 MJ/kg; the process for preparing a fused-ring alkane fuel, wherein the process includes steps of: (1) in a presence of ultraviolet light and a photocatalyst, a Diels-Alder cycloaddition reaction between a substituted or unsubstituted cyclic enone and a substituted or unsubstituted furan molecule occurs to produce a fuel precursor molecule:
(2) the fuel precursor molecule obtained in the step (1) is subjected to hydrodeoxygenation to produce the fused-ring alkane fuel.