1372714-65-2Relevant articles and documents
Gold(I)/Xiang-Phos-Catalyzed Asymmetric Intramolecular Cyclopropanation of Indenes and Trisubstituted Alkenes
Zhang, Pei-Chao,Wang, Yidong,Zhang, Zhan-Ming,Zhang, Junliang
, p. 7049 - 7052 (2018)
The first intramolecular enantioselective cyclopropanation of indenes and trisubstituted alkenes was accomplished by using new chiral phosphine X5 derived gold(I) complexes. This reaction is a straightforward, efficient method for constructing [5-3-6] fused-ring compounds with two vicinal all-carbon quaternary stereogenic centers, a core structure shared by numerous pharmacological products, and bioactive compounds. The salient features of this transformation include high enantioselectivity (up to >98% ee), excellent yield (>97%), and nice functional group tolerance.
Cobalt-catalyzed (Z)-selective semihydrogenation of alkynes with molecular hydrogen
Chen, Caiyou,Huang, Yi,Zhang, Zongpeng,Dong, Xiu-Qin,Zhang, Xumu
supporting information, p. 4612 - 4615 (2017/04/28)
Cobalt-catalyzed highly (Z)-selective semihydrogenation of alkynes using molecular H2 was developed using commercially available and cheap cobalt precursors. A variety of (Z)-alkenes were obtained in moderate to excellent selectivities [(Z)-alkene/(E)-alkene/alkane ratio up to >99 : 1 : 1] and it was found that the readily available ethylenediamine ligand is crucial in determining the selectivity.
Gold(I)-catalyzed 6-endo-dig hydrative cyclization of an alkyne-tethered ynamide: Access to 1,6-dihydropyridin-2(3H)ones
Ghosh, Nayan,Nayak, Sanatan,Sahoo, Akhila K.
, p. 9428 - 9433 (2013/07/26)
Hydrate your chemistry! Hydrative cyclization of 5-yne-ynamides in the presence of Echavarren's catalyst and p-toluenesulphonic acid (PTSA)×H2O at room temperature affords an array of 1,6-dihydropyridin-2(3H)one derivatives. Isomerization, epoxidation, and hydrogenation of the double bond and insertion of an extended π-conjugate system into the pyridinone skeleton have been successfully accomplished (see scheme; Ts=tosyl). Copyright
