“…Highly effective methods for their (a) reduction, (b) Nef-type transformation, (c) benzylic OH oxidation, (d) Ritter or Mitsunobu reaction, benzylic arylation, aminosulfonylation, deoxyhalogenation, (e) C - alkylation, α-halogenation, , (f) radical denitrations, (g) direct deoxygenations, (h) O - silylation, O-alkylation, , O - acylation and related kinetic resolution, , (i) dehydration, etc. have been discovered.…”