Tetrahydro-1H-benzazepinones and hexahydroazepinones as selective
申请人:Pfizer Inc.
公开号:US05618811A1
公开(公告)日:1997-04-08
This invention relates to compounds of formula (I) wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and X are as defined in the application. These compounds are CCK-B receptor antagonists and are useful in the treatment and prevention of central nervous system and gastrointestinal disorders. ##STR1##
Enantioselective α-Benzylation of Acyclic Esters Using π-Extended Electrophiles
作者:Kevin J. Schwarz、Chao Yang、James W. B. Fyfe、Thomas N. Snaddon
DOI:10.1002/anie.201806742
日期:2018.9.10
esters is reported. This reaction proceeds via stereodefined C1‐ammonium enolate nucleophiles. Critical to its success was the identification of benzylic phosphate electrophiles, which were uniquely reactive. Alkylated products were obtained with very high levels of enantioselectivity, and this method has been applied toward the synthesis of the thrombin inhibitor DX‐9065a.
Electrochemical Hydro- and Deuterocarboxylation of Allenes
作者:Cheng-Lin Ding、Jun-Song Zhong、Hong Yan、Ke-Yin Ye
DOI:10.1055/a-2200-5332
日期:——
Electrochemical hydrocarboxylation and deuterocarboxylation of allenes and carbon dioxide were achieved with H2O and D2O, respectively. This reaction generally affords good to excellent regioselectivity in the formation of diverse carboxylic acids.
Visible-light-promoted hydrocarboxylation of allenes with formate salt and CO2 was developed for the first time using commercially available [Ir(ppy)2(dtbbpy)]PF6 as a photocatalyst. This strategy provides an efficient and practical method to access β,γ-unsaturated linear carboxylic acids in moderate yields with complete regioselectivity.