Diastereoselective Ireland–Claisen rearrangements of substituted allyl β-amino esters: applications in the asymmetric synthesis of C(5)-substituted transpentacins
作者:Stephen G. Davies、Ai M. Fletcher、James A. Lee、Paul M. Roberts、Myriam Y. Souleymanou、James E. Thomson、Charlotte M. Zammit
DOI:10.1039/c4ob00274a
日期:——
The diastereoselective Ireland–Claisen rearrangement of a range of substituted allyl β-amino esters gave the corresponding enantiopure α-substituted-β-amino esters with good diastereoselectivity. The application of this methodology in the asymmetric synthesis of a range of C(5)-substituted 1,2-anti-1,5-syn-transpentacins was demonstrated by the rearrangement of a range of β-amino esters derived from
A production method of an optically active &bgr;-amino acid represented by the formula (I)
1
wherein each symbol is as defined in the specification, which includes reacting a compound represented by the formula (II) with a lithium amide represented by the formula (III) in the presence of a compound represented by the formula (IV).
A production method of an optically active β-amino acid represented by the formula (I)
wherein each symbol is as defined in the specification, which includes reacting a compound represented by the formula (II) with a lithium amide represented by the formula (III) in the presence of a compound represented by the formula (IV).