base-mediated hydroamination protocol, using substoichiometric amounts of a hydrosilane and potassium tert-butoxide, that operates under mild conditions at 30 °C. Many aryl- and heteroatom-substituted olefins as well as arylamines are tolerated, affording the desired products with complete regioselectivity. Preliminary mechanistic investigations reveal a non-radical pathway for hydroamination. A sequential
我们提出了一种碱介导的加氢胺化方案,使用亚化学计量的氢硅烷和叔丁醇钾,在 30°C 的温和条件下运行。可以耐受许多芳基和杂原子取代的烯烃以及芳基胺,从而提供具有完全区域选择性的所需产物。初步的机理研究揭示了加氢胺化的非自由基途径。还开发了一种顺序远程加氢胺化策略,包括初始 Fe 催化的烯烃异构化,然后是我们的碱介导的加氢胺化,以直接从末端脂肪族烯烃中获取 β-芳基胺。
A catalyst-free and additive-free method for the synthesis of benzothiazolethiones from <i>o</i>-iodoanilines, DMSO and potassium sulfide
作者:Xiaoming Zhu、Wenguang Li、Xiai Luo、Guobo Deng、Yun Liang、Jianbing Liu
DOI:10.1039/c8gc00477c
日期:——
Under catalyst-free and additive-free conditions, a novel, convenient, environment-friendly method for the synthesis of benzothiazolethiones from o-iodoanilines, K2S and DMSO has been developed.
A copper catalyzed three-component reaction was developed for the synthesis of benzothiazolones. In the presence of CuBr2, the reaction of o-iodoanilines and K2S with DMF proceeded smoothly and generated the corresponding benzothiazolones with good isolated yields. DMF functioned both as the carbon monoxide source and as the reaction medium in this reaction.
Palladium-catalyzed annulation of benzynes with N-substituted-N-(2-halophenyl)formamides: synthesis of phenanthridinones
作者:Yuan Yang、Hui Huang、Lijun Wu、Yun liang
DOI:10.1039/c4ob00997e
日期:——
A novel and efficient procedure for the synthesis of N-substituted phenanthridinones via palladium-catalyzed annulation of benzynes with N-substituted-N-(2-halophenyl)formamides has been developed. This methodology constructs two new C–C bonds via an arylation/annulation process, and provides the desired products in good yields.
Radioiodine containing amines, their preparation and their use as brain imaging agents
申请人:F. HOFFMANN-LA ROCHE & CO.
Aktiengesellschaft
公开号:EP0011858A1
公开(公告)日:1980-06-11
Certain radioiodine containing amines useful as brain imaging agents as well as their preparation are disclosed. The compounds of the invention are represented by the formula
Wherein I is a radioisotope of iodine with 1-123 being preferred, R is lower alkyl or halogen, R and R2 are the same or different and are selected from the group consisting of hydrogen and lower alkyl, R3 and R4 are the same or different and are selected from the group consisting of hydrogen, alkyl, aryl, substituted aryl, aralkyl, substituted aralkyl and substituted carbamoylmethyl or R3 and R4 taken together with the nitrogen to which they are attached form a 5- or 6-membered ring which may be substituted with one or more lower alkyl groups, x is 0 to 4, y is 0 to 3 and z is 0 or 1, and pharmaceutically acceptable acid addition salts thereof.