Xiao Z.-H.,Xiamen University |
Liu L.-X.,Xiamen University |
Liu L.-X.,Ganan Teachers College |
Liu C.,Xiamen University |
Huang P.-Q.,Xiamen University
Synthetic Communications | Year: 2011
We report in this paper a flexible approach to (4S,5S)-5-alkyl-1-benzyl-4- benzyloxy-2-pyrrolidinones 7 starting from the known 5-alkyl-1-benzyl-4- benzyloxy-5-hydroxy-2-pyrrolidinones 6. The method is based on TMSCl-mediated reductive dehydroxylation of 6 with Zn(BH4)2, which allows the synthesis of a variety of 2-pyrrolidinones 7 in 48-75% yields with cis=trans diastereoselectivities ranging from 58:42 to 90:10. Copyright © 2011 Taylor & Francis Group, LLC.
Poon K.C.,Hong Kong University of Science and Technology |
Poon K.C.,Ganan Teachers College |
Liu L.,Hong Kong University of Science and Technology |
Liu L.,Ganan Teachers College |
And 12 more authors.
Angewandte Chemie - International Edition | Year: 2010
(Figure Presented) Do the Maca-Rhena: Although there are many known stable metallabenzenes that contain a late transition metal, there are no examples of the direct observation of metallabenzenes that contain an early or middle transition metal. The isolation and structural characterization of air-stable rhenabenzenes 1 and 2 (see scheme) are reported. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA.