The diazo route to diazonamide A: studies on the tyrosine-derived fragment
作者:Francine N. Palmer、Franck Lach、Cyril Poriel、Adrian G. Pepper、Mark C. Bagley、Alexandra M. Z. Slawin、Christopher J. Moody
DOI:10.1039/b510653b
日期:——
the original structure of diazonamide A was prepared in eight steps from N-Z-tyrosine tert-butyl ester. Iodination, O-protection and Stille coupling gave the cinnamyl alcohol 25, converted via the bromide into the allyl aryl ether 27. Subsequent Claisen rearrangement and oxidative cleavage of the alkene gave the lactol 29, converted into the desired benzofuranone 31. The revision in the structure of