Microwave-assisted direct biaryl coupling: first application to the synthesis of aporphines
作者:Sandeep Chaudhary、Stevan Pecic、Onica LeGendre、Wayne W. Harding
DOI:10.1016/j.tetlet.2009.03.029
日期:2009.5
microwaves in a direct biaryl coupling reaction for the synthesis of analogs of the aporphinealkaloid nantenine. Our study shows that the aporphine core may be rapidly accessed from benzyl-tetrahydroisoquinoline substrates with this method. This is the first report of a microwave-assisted direct biaryl coupling reaction in the synthesis of aporphine molecules.
Total Synthesis of (±)-Armepavines and (±)-Nuciferines From (2-Nitroethenyl)benzene Derivatives
作者:Chia-Fu Chang、Chu-Yun Huang、Yu-Chao Huang、Kuan-Yu Lin、Yean-Jang Lee、Chau-Jong Wang
DOI:10.1080/00397910903435411
日期:2010.11.3
A concise route to armepavine 1 and nuciferine 2 and 3, which can be isolated from the leaves of Nelumbo nucifera (Nymphaceae), has been achieved in which the longest linear sequence is only six steps from commercially available benzaldehyde in 28%, 21%, and 20% overall yield, respectively. The key transformations in the synthesis are the radical cyclization of aryl bromide with Bu3SnH and the Pictet-Spengler reaction of N-substituted amine with aldehyde.