for the synthesis of organic carbamates from carbondioxide has been developed via photolysis of α-aryldiazoesters under mild conditions in the absence of any catalysts and additives. By using different solvents, a four- or three-component coupling reaction involving aryldiazoesters, amines and carbondioxide could occur rapidly and selectively, giving a variety of structurally diverse organic carbamates
A new organic low-molecular-mass compound N-dehydroabietyl-4-bromobenzamide (1) was synthesized using natural biomass dehydro-abietylamine and 4-bromobenzoic acid. Single crystal structure analysis revealed that compound 1 crystallized in a chiral and polar space group P21 and adjacent molecules were hold together by almost straight line N-H···O hydrogen bond chain. Compound 1 exhibits good second-order nonlinear optical and ferroelectric properties. The results indicated a new type organic ferroelectric material derived from natural biomass dehydroabietylamine.
Synthesis of Complex Dihydroisoquinolin Derivatives
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Cobalt‐Electrocatalyzed C−H Activation
作者:Yin‐Hui Huang、Lin Dong
DOI:10.1002/adsc.202201155
日期:2023.1.10
We developed a cost-effective cobalt-catalyzed electrochemical annulation to generate diversified novel complex dihydroisoquinolin derivatives from amides and alkenes in a simple and maneuverable undivided cell. The reaction proceeded C−H/N−H activation, and the catalyst was regenerated by anodic oxidation. Notably, the strategy of electrocatalysis avoided the consumption of stoichiometric chemical
Amide-Directed, Rhodium-Catalyzed Enantioselective Hydrosilylation of Unactivated Internal Alkenes
作者:Wen-Ran Zhang、Wen-Wen Zhang、Huanrong Li、Bi-Jie Li
DOI:10.1021/acs.orglett.3c00289
日期:2023.3.17
recent advances made in the area of asymmetric hydrosilylation, metal-catalyzed enantioselective hydrosilylation of unactivated internal alkenes remains a challenge. Here, we report a rhodium-catalyzed enantioselective hydrosilylation of unactivated internal alkenes bearing a polar group. The coordination assistance by an amide group enables the hydrosilylation to occur with high regio- and enantioselectivity