Intramolecular Morita–Baylis–Hillman adducts via sequential MBH and ring-closing-metathesis reactions
摘要:
Using a tandem Morita-Baylis-Hiliman (MBH) and ring-closing-metathesis (RCM) sequence, an alternative high yielding method for the construction of intramolecular Morita-Baylis-Hillman (IMBH) mono- and bicyclic functionalized cycloalkenols is reported. (c) 2005 Elsevier Ltd. All rights reserved.
[reaction: see text] Asymmetricallylicamination of allylic carbonates prepared from racemic Morita-Baylis-Hillman adducts proceeded in the presence of Pd catalyst, chiral diaminophosphine oxide (DIAPHOX), and BSA, affording the corresponding chiral aza-Morita-Baylis-Hillman adduct derivatives in excellent yield with up to 99% ee. The cyclic reaction products could be converted into various synthetically
Intramolecular Morita–Baylis–Hillman adducts via sequential MBH and ring-closing-metathesis reactions
作者:Marie E. Krafft、Eun-Ho Song、Ryan J. Davoile
DOI:10.1016/j.tetlet.2005.07.066
日期:2005.9
Using a tandem Morita-Baylis-Hiliman (MBH) and ring-closing-metathesis (RCM) sequence, an alternative high yielding method for the construction of intramolecular Morita-Baylis-Hillman (IMBH) mono- and bicyclic functionalized cycloalkenols is reported. (c) 2005 Elsevier Ltd. All rights reserved.