First total synthesis of the 4a-methyltetrahydrofluorene diterpenoids (+/-)-dichroanal B and (+/-)-dichroanone.
[reaction: see text] A simple synthesis of the 4a-methyltetrahydrofluorene diterpenoids (+/-)-dichroanal B and (+/-)-dichroanone has been achieved through a common hexahydrofluorenone intermediate obtained via Pd(0)-catalyzed reductive cyclization of a substituted 2-(2-bromobenzyl) methylene cyclohexane.
Banerjee
Mainak
M
Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Kolkata-700 032, India.
Mukhopadhyay
Ranjan
R
Achari
Basudeb
B
Banerjee
Asish Kr
AK