nyl or OH; and R.sub.1 is CH.sub.3, CH.sub.2F, CHF.sub.2, CF.sub.3, CH.sub.2CH.sub.3, or CF.sub.2CF.sub.3; said process comprising the steps of: a) converting a cyclic compound offormula IX wherein R.sub.1 is as defined above, L is a leaving group, and T.sub.1 is O or NH, to a compound of formula VIII wherein L and R.sub.1 are as defined above and T.sub.2 is OH or NH.sub.2; ##STR00085## b) reactin