Br[C:2]1[C:3]([O:16][CH2:17][CH2:18][CH3:19])=[CH:4][C:5]2[C:6]([CH3:15])([CH3:14])[CH2:7][CH2:8][C:9]([CH3:13])([CH3:12])[C:10]=2[CH:11]=1.[BH:20]([OH:22])[OH:21]>>[CH2:17]([O:16][C:3]1[CH:2]=[CH:11][C:10]2[C:9]([CH3:13])([CH3:12])[CH2:8][CH2:7][C:6]([CH3:15])([CH3:14])[C:5]=2[C:4]=1[B:20]([OH:22])[OH:21])[CH2:18][CH3:19]In a similar manner to Example 3(a), by reaction of 8 g (24.6 mmol) of 3-bromo-2-propyloxy-5,6,7,8-tetrahydro-5,5,8,8-tetramethylnaphthalene, 5.7 g (80%) of the expected boronic acid are obtained, with a melting point of 138-9° C.
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