RO 7 a (a) R= Alk= Me (P)(a) R= H, A1= Rz= Alk= Me (p)(b) R= En, Alk= Pent (b) R= Me, R1 Rz En, Alk= Pent (c) R= Me, R1= Pivaloyl R2= H, Alk= Pent reactivity must be taken into account. The correspondence be-tween computed and experimental values in Table l encourages the hope that PM3 data can be used routinely as a qualitatioe guide to determine how or whether torsional effects can be ex-ploited in an armed/disarmed sense. ...
