在本报告中,通过铜(I)催化的偶氮甲碱叶立德和炔烃部分的分子内反应实现了邻炔氧基二酮哌嗪的两种独特的分子内环化(从一锅 Ugi 后转化获得)。起始材料中内部炔烃的存在通过[3+2]-环加成引导反应,而末端炔烃导致偶氮甲碱叶立德和末端不饱和C-C键之间的螺环化反应。这种方法为以高产率合成具有挑战性的二氮杂双环化合物和螺-二酮哌嗪基色满提供了机会,并具有独特的非对映选择性。
作者:Vera J. Meyer、Liang Fu、Fabian Marquardt、Meike Niggemann
DOI:10.1002/adsc.201300253
日期:2013.7.8
A cycloisomerization of enynes with a benign calcium catalyst is presented exploring a complementary reactivity to that usually found in transition and noble metal‐catalyzed reactions. Thereby, a systematic investigation of the π‐activation of alkynes with reactive carbocations has been realized and ketones of various ring sizes were easily accessed. We are certain that these basic investigations will
The present invention relates to new tricyclic triazolic compounds having a high affinity for sigma-1 receptor as well as to the process for the preparation thereof, to composition comprising them and to their use as medicaments according to compounds of formula (I)
Wherein R1 and R2 are as defined in the description.
Borylative Cyclization of 1,6-Allenynes Driven by BCl<sub>3</sub>
作者:Chun-Hua Yang、Xiangkun Sun、Congcong Niu、Zhiwei Zhang、Mingzhu Liu、Fangjie Zheng、Ling Jiang、Xiangtao Kong、Zhantao Yang
DOI:10.1021/acs.orglett.1c03062
日期:2021.10.15
A metal-free intramolecular borylative cyclization of 1,6-allenynes driven by BCl3 was developed. This method provides a general and practical strategy to construct valuable pyrrolidines containing all-carbon quaternary centers or 3,5-dihydroazepine derivatives depending on the substituents of the allene, with conjugative and sterically hindered phenyl groups favoring the latter.
Synthesis of Carbolines via Palladium/Carboxylic Acid Joint Catalysis
作者:Gianpiero Cera、Matteo Lanzi、Davide Balestri、Nicola Della Ca’、Raimondo Maggi、Franca Bigi、Max Malacria、Giovanni Maestri
DOI:10.1021/acs.orglett.8b01072
日期:2018.6.1
The combination of a Pd(0) complex with benzoic acid converts propargylic tryptamines to the corresponding tetrahydro-β-carbolines. The method uses unprotected indoles and affords the desired products with ample functional group tolerance. Detailed modeling studies reveal a close synergy between the organic and metal catalysts, which enables sequential alkyne isomerization, indole C–H activation, and
Heterocyclic compounds with carboxyl isostere groups and their use for the treatment of cardiovascular diseases
申请人:Bartel Stephan
公开号:US20090227640A1
公开(公告)日:2009-09-10
The present application relates to novel heterocyclic compounds, processes for their preparation, their use for the treatment and/or prophylaxis of diseases, and their use for producing medicaments for the treatment and/or prophylaxis of diseases, especially for the treatment and/or prevention of cardiovascular disorders.