Enantioselective Hydroformylation of 1-Alkenes with Commercial Ph-BPE Ligand
摘要:
A rhodium complex, in conjunction with commercially available Ph-BPE ligand, catalyzes the branch-selective asymmetric hydroformylation of 1-alkenes and rapidly generates alpha-chiral aldehydes. A wide range of terminal olefins Including 1-dodecene were examined, and all delivered high enantioselectivity (up to 98:2 er) as well as good branch:linear ratios (up to 15:1).
Enantioselective Hydroformylation of 1-Alkenes with Commercial Ph-BPE Ligand
摘要:
A rhodium complex, in conjunction with commercially available Ph-BPE ligand, catalyzes the branch-selective asymmetric hydroformylation of 1-alkenes and rapidly generates alpha-chiral aldehydes. A wide range of terminal olefins Including 1-dodecene were examined, and all delivered high enantioselectivity (up to 98:2 er) as well as good branch:linear ratios (up to 15:1).
Intramolecular Anodic Olefin Coupling Reactions and the Synthesis of Cyclic Amines
作者:Hai-Chao Xu、Kevin D. Moeller
DOI:10.1021/ja910586v
日期:2010.3.3
Anodic olefin couplingreactions using a tosylamine trapping group have been studied. The cyclizations are favored by the use of a less-polar radical cation and more basic reaction conditions. The most significant factor for obtaining good yields of cyclic product is the use of the more basic reaction conditions. However, a number of factors including the nature of both the solvent and the electrolyte
Intramolecular Hydroamination of Dithioketene Acetals: An Easy Route To Cyclic Amino Acid Derivatives
作者:Hai-Chao Xu、Kevin D. Moeller
DOI:10.1021/ol102193x
日期:2010.11.19
Catalytic intramolecular hydroamination of dithioketene acetals was developed for the synthesis of cyclic amino acid derivatives. Triggered by the addition of a catalytical amount of n-BuLi, the reaction proceeds to give proline and pipecolic acid derivatives in excellent yields and diastereoselectivity.