Convergent Synthesis and Biological Activity of the WXYZA′B′C′ Ring System of Maitotoxin
摘要:
The WXYZA'B'C' ring system (1) of maitotoxin (MTX) was synthesized in a convergent manner via successive coupling of the W, Z, and C' ring fragments through construction of the XY and A'B' ring systems. The synthetic segment 1 blocked the hemolytic activity elicited by MTX.
The WXYZA'B'C' ring system (1) of maitotoxin (MTX) was synthesized in a convergent manner via successive coupling of the W, Z, and C' ring fragments through construction of the XY and A'B' ring systems. The synthetic segment 1 blocked the hemolytic activity elicited by MTX.
Convergent Syntheses of the WXYZ Ring of Maitotoxin and the HIJK Ring of Brevisulcenal-F
A convergent method to construct the 6/7/6/6-tetracyclic ether system possessing contiguous angular methyl groups was developed. The key steps of the synthesis involve coupling of a lithium acetylide and an aldehyde, cyclodehydration of a hydroxy ketone to form a dihydropyran, ring expansion of a six-membered ring ketone into a seven-membered one, and methylation of a mixed-thioacetal. Based on this