27024-89-1Relevant academic research and scientific papers
Facile domino access to chiral bicyclo[3.2.1]octanes and discovery of a new catalytic activation mode
Tan, Bin,Lu, Yunpeng,Zeng, Xiaofei,Chua, Pei Juan,Zhong, Guofu
supporting information; experimental part, p. 2682 - 2685 (2010/09/03)
(Figure presented) A highly enantio- and diastereoselective organocatalytic domino Michael-Henry process for the preparation of synthetically unique and medicinally important bicyclo[3.2.1]octane derivatives with four stereogenic centers including two quaternary stereocenters has been developed. Theoretical DFT calculations on the transition states have been carried out to reveal origins of the excellent stereoselectivities. A novel dual model was thus proposed.
Addition of (Methylthio)methyl p-Tolyl Sulfone to α,β-Unsaturated Carbonyl Compounds
Ogura, Katsuyuki,Yahata, Nobuhiro,Minoguchi, Masanori,Ohtsuki, Kazuo,Takahashi, Kazumasa,Iida, Hirotada
, p. 508 - 512 (2007/10/02)
The lithio derivative of (methylthio)methyl p-tolyl sulfone (1) reacted with various α,β-unsaturated carbonyl compounds to afford adducts in good to high yields.The introduced (methylthio)(p-tolylsulfonyl)methyl group was easily converted to a (methylthio)carbonyl group or a formyl group.When the reaction of 1 with methyl acrylate using sodium hydride as a base was performed in DMF at an ambient temperature,2-(methoxycarbonyl)-4-(methylthio)-4-(p-tolylsulfonyl)cyclohexanone (8) was obtained in 81 percent yield.Furthermore, 8 was shown to be an important intermediate for preparing 2-substituted 2-(methoxycarbonyl)-1,4-cyclohexanediones.
