The degree of hydrolysis of polyphosphoric acid (PPA) has a crucial effect on the regioselectivity of the PPA-mediated synthesis of indanones. It was found that the regioselectivity can be switched by employing PPA with either a high or low content of P2O5. This methodology was used for the regioselective synthesis of a range of electron-rich indanones, including a natural sesquiterpene.
CAMBIE, RICHARD C.;CRAW, PETER A.;BUCKLETON, JOHN S.;CLARK, GEORGE R.;RIC+, AUSTRAL. J. CHEM., 41,(1988) N 3, C. 365-372
作者:CAMBIE, RICHARD C.、CRAW, PETER A.、BUCKLETON, JOHN S.、CLARK, GEORGE R.、RIC+