Thiophene-3-boronic acid → 2-Cyclopropyl-3-thiophen-3-yl-2,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene

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Reaction Steps

The title compound (134 mg) was prepared according to Example 281 using 200 mg of 2-cyclopropyl-3-trifluoromethanesulfonyloxy-4,5,7,8-tetrahydro-2H-1,2,6-triaza-azulene-6-carboxylic acid tert-butyl ester (Example 281, Step C) and 84 mg of 3-thiopheneboronic acid. MS (ESI): exact mass calculated for C14H17N3S, 259.11. found, m/z 260.4 [M+H]+. 1H NMR (500 MHz, CD3OD): 7.64-7.63 (m, 2H), 7.31-7.29 (m, 1H), 4.65 (br s, 1H), 3.70-3.60 (br s, 1H), 3.57-3.52 (m, 1H), 3.40-3.38 (m, 1H), 3.19 (br s, 1H), 3.13-3.11 (m, 1H), 2.99-2.96 (m, 1H), 2.91-2.89 (m, 1H), 0.93-0.88 (m, 4H).

Provenance & Evidence