An efficient and convenient palladium-catalyzed direct intermolecular silylation of C(sp2)–H bonds by using disilanes as the silicon source with the assistance of a readily removable bidentate directing group is reported. This strategy provided a regio- and stereoselective protocol for exclusive synthesis of Z-vinylsilanes with reasonable to excellent yields and good functional group compatibility
The Nickel(II)-Catalyzed Direct Benzylation, Allylation, Alkylation, and Methylation of C–H Bonds in Aromatic Amides Containing an 8-Aminoquinoline Moiety as the Directing Group
Direct alkylation via the cleavage of the ortho C–H bonds by a nickel-catalyzed reaction of aromaticamides containing an 8-aminoquinoline moiety as the directing group with alkyl halides is report...
Copper-Catalyzed Direct sp<sup>2</sup> C–H Silylation of Arylamides Using Disilanes
作者:Writhabrata Sarkar、Aniket Mishra、Arup Bhowmik、Indubhusan Deb
DOI:10.1021/acs.orglett.1c01129
日期:2021.6.18
A copper-catalyzed method for direct intermolecular ortho-silylation of benzamides has been developed that affords organosilane products in moderate to high yields. The key features include: (i) use of commercially available disilanes as a silicon source with 8-aminoquinoline as a bidentate directing group, (ii) use of earth-abundant first-row transition metal, (iii) operationally simple conditions
Co(<scp>iii</scp>)-catalyzed <i>Z</i>-selective oxidative C–H/C–H cross-coupling of alkenes with triisopropylsilylacetylene
作者:Tingxing Zhao、Dekun Qin、Weiguo Han、Shiping Yang、Boya Feng、Ge Gao、Jingsong You
DOI:10.1039/c9cc02347j
日期:——
A Co(III)-catalyzed direct oxidative C–H/C–Hcross-couplingreaction of acrylamides with triisopropylsilylacetylene is presented. It is applicable to unsubstituted, internal and terminal acrylamides with a broad functionality tolerance. The feasibility of this protocol is successfully demonstrated by the late-stage alkynylation of a derivative of steroid drug Epristeride.