Styrene as 4π-Component in Zn(II)-Catalyzed Intermolecular Diels–Alder/Ene Tandem Reaction
作者:Min Zheng、Feng Wu、Kai Chen、Shifa Zhu
DOI:10.1021/acs.orglett.6b01511
日期:2016.8.5
A mild Zn-catalyzed intermolecular Diels–Alder/ene tandemreaction with styrene as a 4π-component is reported. A variety of dihydronaphthalene products could be prepared in moderate to good yields. Moreover, a combination of DFT calculations and experiments was performed to further understand the mechanism of this unique tandemreaction.
An efficient RhII -catalyzed synthesis of functionalized α-vinyl aldehydes with high E/Z stereoselectivity was developed. The reaction mediates the cyclopropanation of enaminones with vinyl carbenoids that are generated from cyclopropenes in situ to give the aminocyclopropane intermediates. Selective C-C bond cleavage of the cyclopropane intermediates leads to formation of α-vinyl aldehyde derivatives
A straightforward indole synthesis via annulation of C-nitrosoaromatics with conjugated terminal alkynones was realised achieving a simple, highly regioselective, atom- and step economical access to 3-aroylindoles in moderate to good yields. Further functionalizations of indole scaffolds were investigated and an easy way to JWH-018, a synthetic cannabinoid, was achieved.
Enantioselective [3 + 2] annulation of 4-isothiocyanato pyrazolones and alkynyl ketones under organocatalysis
作者:Wenyao Wang、Shiqiang Wei、Xiaoze Bao、Shah Nawaz、Jingping Qu、Baomin Wang
DOI:10.1039/d0ob02423f
日期:——
4-isothiocyanato pyrazolones with alkynylketones in the presence of an organic catalyst derived from a cinchona alkaloid under mild conditions is realized. This protocol provides unprecedented expeditious access to a wide range of optically active spiro[pyrroline–pyrazolones] with various electronic properties in high yields with good to excellent enantioselectivities.
申请人:UIF (University Industry Foundation), Yonsei University 연세대학교 산학협력단(220050095099) BRN ▼110-82-10500
公开号:KR20180106800A
公开(公告)日:2018-10-01
본 발명은 신규한 셀레노플라본 화합물의 제조 방법 및 상기 셀레노플라본 화합물을 포함하는 비만 예방 또는 치료용 약학 조성물에 관한 것이다. 본 발명에서는 팔라듐-촉매를 사용하여 직접적 C-H 아릴화(palladium-catalyzed direct C-H arylation)를 통해 합성적인 어려움으로 인해 합성된 적이 없었던 셀레노플라본, 특히 PMSF을 합성할 수 있다. 상기 합성된 셀레노플라본은 BAT (brown adipose tissue)의 활성화와 관련된 개선 효과를 가지므로, 상기 셀레노플라본은 비만의 예방 및 치료를 위한 조성물에 사용될 수 있다.
本发明涉及一种新型硒代芳烃化合物的制备方法以及包含所述硒代芳烃化合物的用于肥胖预防或治疗的药学组合物。本发明利用钯催化剂直接进行C-H芳基化反应(palladium-catalyzed direct C-H arylation),合成了以前由于合成困难而未合成过的硒代芳烃,特别是可以合成PMSF。由上述合成的硒代芳烃具有改善BAT(棕色脂肪组织)活化相关效果,因此,该硒代芳烃可用于用于肥胖预防或治疗的组合物中。