A convenient synthesis of new diamine, amino alcohol and aminophosphines chiral auxiliaries based on limonene oxide
摘要:
A strategy for the synthesis of new chiral auxiliaries based upon vicinal diamines, amino alcohols and aminophosphines, obtained from limonene oxide, has been developed. The methodology allows the preparation of (1R,2R,4S)-1-methyl-4-(prop-1-en-2-yl)cyclohexane-1,2-diamine starting from a commercially available mixture of cis/trans (4S)-(-)-limonene oxides, through a stereoconvergent synthetic sequence. The process starts from an inexpensive naturally occurring material, is amenable to scale-up and allows easy access to highly useful enantiopure building blocks and ligands, employed in asymmetric catalysis. (C) 2009 Elsevier Ltd. All rights reserved.
Scaleable Syntheses of Isomeric Limonene Aziridines from the Commercially Available Mixture of cis- and trans-Limonene Oxides
摘要:
A short and efficient route to both isomers of limonene aziridine is described. The process is amenable to scale-up and allows easy access to multigram quantities of these highly useful chiral building blocks.
Regio- and diastereoselective synthesis of bifunctionalized limonenes
作者:Michael V. Voronkov、Ramanaiah C. Kanamarlapudi、Paul Richardson
DOI:10.1016/j.tetlet.2005.08.009
日期:2005.10
High regio- and diastereoselective ring opening of limonene aziridines with a variety of nucleophiles is described. The resulting novel chiral derivatives are readily accessible from limonene aziridine in either enantiomeric form in 35-94'% yield. (c) 2005 Elsevier Ltd. All rights reserved.
A convenient synthesis of new diamine, amino alcohol and aminophosphines chiral auxiliaries based on limonene oxide
A strategy for the synthesis of new chiral auxiliaries based upon vicinal diamines, amino alcohols and aminophosphines, obtained from limonene oxide, has been developed. The methodology allows the preparation of (1R,2R,4S)-1-methyl-4-(prop-1-en-2-yl)cyclohexane-1,2-diamine starting from a commercially available mixture of cis/trans (4S)-(-)-limonene oxides, through a stereoconvergent synthetic sequence. The process starts from an inexpensive naturally occurring material, is amenable to scale-up and allows easy access to highly useful enantiopure building blocks and ligands, employed in asymmetric catalysis. (C) 2009 Elsevier Ltd. All rights reserved.
Scaleable Syntheses of Isomeric Limonene Aziridines from the Commercially Available Mixture of <i>cis</i>- and <i>trans</i>-Limonene Oxides
作者:Michael V. Voronkov、Alexander V. Gontcharov、Ramanaiah C. Kanamarlapudi、Paul F. Richardson、Zhi-Min Wang
DOI:10.1021/op0498464
日期:2005.3.1
A short and efficient route to both isomers of limonene aziridine is described. The process is amenable to scale-up and allows easy access to multigram quantities of these highly useful chiral building blocks.