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.
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.
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.
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.
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.