STUDIES ON THE REACTIONS OF 2-BROMO-3-KETOTRITERPENOIDS .3. REACTION OF LI EDA ON 2 ALPHA-BROMO AND 2,2-DIBROMO DERIVATIVES OF LUPANONE ANDMETHYL DIHYDROBETULONATE/
Bp. Pradhan et P. Ghosh, STUDIES ON THE REACTIONS OF 2-BROMO-3-KETOTRITERPENOIDS .3. REACTION OF LI EDA ON 2 ALPHA-BROMO AND 2,2-DIBROMO DERIVATIVES OF LUPANONE ANDMETHYL DIHYDROBETULONATE/, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 32(10), 1993, pp. 1068-1069
The reaction of lithium in ethylenediamine with 2,2-dibromo (1/1') and
2alpha-bromo (2/2') derivatives of lupanone (3) and methyl dihydrobet
ulonate (3') furnishes lupanone/methyl dihydrobetulonate (3/3') and th
e pyrazine derivative (4/4').