205746-51-6Relevant articles and documents
Stereoselective [4 + 1] annulation reactions with silyl vinylketenes derived from fischer carbene complexes
Moser, William H.,Feltes, Laura A.,Sun, Liangdong,Giese, Matthew W.,Farrell, Ryan W.
, p. 6542 - 6546 (2006)
Stable silyl vinylketenes were prepared via the thermal reaction of Fischer carbene complexes with triisopropylsilyl- or tert-butyldimethylsilyl- substituted alkynes. The ability of these silyl vinylketenes to participate with carbenoid reagents in [4 + 1
Cobalt-Catalyzed Chemo- and Enantioselective Hydrogenation of Conjugated Enynes
Hu, Yanhua,Liu, Yangang,Zhang, Wanbin,Zhang, Zhenfeng
supporting information, p. 16989 - 16993 (2021/06/28)
Asymmetric hydrogenation is one of the most powerful methods for the preparation of single enantiomer compounds. However, the chemo- and enantioselective hydrogenation of the relatively inert unsaturated group in substrates possessing multiple unsaturated bonds remains a challenge. We herein report a protocol for the highly chemo- and enantioselective hydrogenation of conjugated enynes while keeping the alkynyl bond intact. Mechanism studies indicate that the accompanying Zn2+ generated from zinc reduction of the CoII complex plays a critical role to initiate a plausible CoI/CoIII catalytic cycle. This approach allows for the highly efficient generation of chiral propargylamines (up to 99.9 % ee and 2000 S/C) and further useful chemical transformations.
Synthesis of novel resveratrol-phthalide hybrid compounds and evaluation of their inhibitory activities of nitric oxide production
Kimachi, Tetsutaro,Ogata, Tokutaro,Doe, Misae,Sakanaka, Mariko,Nishiuchi, Arisa,Aomatsu, Mio,Tanaka, Manami,Shimizu, Maki,Yoshioka, Natsuko,Kubota, Kurumi,Teraoka, Yui,Nakajima, Chikako,Takahashi, Satoru
, p. 534 - 548 (2019/08/01)
Four types of novel resveratrol-phthalide hybrid compounds were designed and synthesized systematically by Suzuki-Miyaura cross-coupling reaction. These hybrid compounds were evaluated upon an inhibitory effect of the LPS-stimulated NO production in murine macrophage cell line, RAW264.7. As a result, two of them showed stronger inhibitory activity than the original resveratrol.