prov:value
| - As shown the route a of SCHEME I, compounds of formula (g), as described above, may be obtained by a reaction between a ketone of formula (c) wherein R1, R2 and R3 are as defined in formula (I), and a compound of formula (e) wherein A and B are as defined in formula (I), and X is a suitable group such as H, Cl, Br, I, OSO2R or the like
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