Patent ID: 7304160

Claim:
A method of making a compound of Formula II: wherein: R 4 is SiR 20 R 21 R 22 , wherein R 20 , R 21 and R 22 are each independently selected from the group consisting of alkyl, alkenyl, alkynyl and aryl; R 2 , R 5 , and R 6 are each independently selected from the group consisting of H, alkyl, aryl, alkenyl, alkynyl, alkoxy, and halo; R 7 is selected from the group consisting of consisting of H and alkyl; A is a 1, 2 or 3 atom bridging species which forms part of a saturated or monounsaturated 5-, 6- or 7-membered ring including N 7 , C 8 , C 9 and B; B is selected from —O—, —S—, —NR 10 —, wherein R 10 is selected from hydrogen, alkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl, arylalkyl, substituted arylalkyl; —C 10 HR 10a —, wherein R 10a is selected from hydrogen, alkyl, hydroxyalkyl, aryl, aryloxyalkyl, fluoro, trifluoromethyl, cyano, cyanomethyl, —OR′, —NR′ 2 , or —SR′, wherein each R′ is independently hydrogen, alkyl, alkenyl, alkynyl or aryl; or B is ═C 10 R 10a or ═N—; and R 9 and R 9a are each independently selected from hydrogen, alkyl, hydroxyalkyl, aryl, aryloxyalkyl, fluoro, trifluoromethyl, cyano, cyanomethyl, —OR′, —NR′ 2 , or —SR′, wherein each R′ is as defined above; comprising oxidizing a compound of Formula I: wherein A, B, R 2 , R 4 , R 5 , R 6 , R 7 , R 9 , and R 9a are as given above, and R 1 is alkyl, aryl, alkenyl, alkynyl, alkoxy, —NR″ 2 or —SR″, where R″ is alkyl, aryl, alkenyl, alkynyl, or alkoxy, in suitable solvent to produce a compound of Formula II.