A stereoselective synthesis of (.+-.)-H12-histrionicotoxin and related photoaffinity-labeled congeners
作者:David A. Evans、Edward W. Thomas、Richard E. Cherpeck
DOI:10.1021/ja00377a026
日期:1982.6
A practical six-step stereoselective total synthesis of (&)-perhydrohistrionicotoxin (4a) (H,,-HTX) is reported. The desired azaspir0(5S)undecane 6,6 ring system found in these alkaloid toxins has been constructed via the formic acid induced cyclization of either dihydropyridone 6 or carbinolamide 9. The photoaffinity-labeled toxin analogue 4c has also beep prepared, which binds to Torpedo californica