Hypercoordination of aluminum: Evidence for the implication of pentacoordinate complexes in the R2AlCl-promoted reduction of alkoxycarbonyl substrates
摘要:
R2AlCl-promoted reductions of alkoxycarbonyl substrates with Bu3SnH were found to proceed diastereoselectively through the formation of pentacoordinate chelate-type complexes which have been characterized by C-13 NMR spectroscopy. (C) 1999 Elsevier Science Ltd. All rights reserved.
The present invention is directed to compounds of Formula I which are agonists of orexin receptors. The present invention is also directed to uses of the compounds described herein in the potential treatment or prevention of neurological and psychiatric disorders and diseases in which orexin receptors are involved. The present invention is also directed to compositions comprising these compounds. The present invention is also directed to uses of these compositions in the potential prevention or treatment of such diseases in which orexin receptors are involved.
Hypercoordination of aluminum: Evidence for the implication of pentacoordinate complexes in the R2AlCl-promoted reduction of alkoxycarbonyl substrates
R2AlCl-promoted reductions of alkoxycarbonyl substrates with Bu3SnH were found to proceed diastereoselectively through the formation of pentacoordinate chelate-type complexes which have been characterized by C-13 NMR spectroscopy. (C) 1999 Elsevier Science Ltd. All rights reserved.