2-(4-Chlorophenyl)-1,3,2-benzodioxaborole → 3-(4-Chloro-phenyl)-2-isopropyl-2,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene

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Reaction Steps

The title compound (82 mg) was prepared as in Example 177, Steps C and D, using 205 mg of 2-isopropyl-3-trifluoromethanesulfonyloxy-4,5,7,8-tetrahydro-2H-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester (Example 189, Step A) and 332 mg of 2-(4-chloro-phenyl)-benzo[1,3,2]dioxaborole. MS (ESI): exact mass calculated for C16H20ClN3, 289.13; found, m/z 290.4 [M+H]+, 292.4 [M+H]+. 1H NMR (500 MHz, CD3OD): 7.57 (d, J=8.5 Hz, 2H), 7.33 (d, J=8.5 Hz, 2H), 4.36 (m, 1H), 3.44-3.40 (m, 2H), 3.20-3.18 (m, 2H), 2.81-2.76 (m, 2H), 1.40 (d, J=6.6 Hz, 6H).

Provenance & Evidence