2-(Bromomethyl)pyridine → 5,6-dimethyl-1'-(pyridin-2-ylmethyl)spiro[1-benzofuran-3,3'-indol]-2'(1'H)-one

Participants

Reaction Steps

Following the procedure as described in EXAMPLE 9 and making non-critical variations using 5,6-dimethyl-1-(tetrahydro-2H-pyran-4-ylmethyl)spiro[1-benzofuran-3,3′-indol]-2′(1′H)-one to replace 3-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3′-indol]-2′(1′H)-one, and 2-(bromomethyl)pyridine to replace 2-(bromomethyl)-5-(trifluoromethyl)furan, 5,6-dimethyl-1′-(pyridin-2-ylmethyl)spiro[1-benzofuran-3,3′-indol]-2′(1′H)-one was obtained (76%) as a colorless solid: mp 165-168° C. (ethyl acetate/hexanes); 1H NMR (300 MHz, DMSO-d6) δ8.67 (d, J=6.0 Hz, 1H), 8.12-8.06 (m, 1H), 7.59-7.55 (m, 2H), 7.26-7.23 (m, 1H), 7.21-7.20 (m, 1H), 7.03-6.98 (m, 2H), 6.76 (s, 1H), 6.55 (s, 1H), 5.18 (s, 2H), 4.74 (ABq, 2H), 2.13 (s, 3H), 2.01 (s, 3H); 13C NMR (75 MHz, DMSO-d6) δ 177.5, 159.1, 154.0, 146.7, 142.6, 141.5, 138.3, 132.6, 129.1, 126.7, 124.5, 124.4, 124.1, 123.7, 123.5, 111.3, 109.7, 79.5, 57.8, 43.7, 20.2, 19.2; MS (ES+) m/z 357.2 (M+1).

Provenance & Evidence