(2S,3S,3AS)-2-(3,4-dimethoxyphenyl)-3a-methoxy-3-methyl-5-n-propyl-2,3,3a,6-tetrahydro-6-oxo-benzofuran 、
甲氧基胺盐酸盐 在
(2S,3S,3aS)-2-(3,4-dimethoxyphenyl)-3a-methoxy-3-methyl-5-n-propyl-2,3,3a,6-tetrahydro-6-methoxyiminobenzofuran 、 silica gel 、
ethyl acetate n-hexane 作用下,
以
吡啶 为溶剂,
反应 72.0h,
以to afford (2S,3S,3aS)-2-(3,4-dimethoxyphenyl)-3a-methoxy-3-methyl-5-n-propyl-2,3,3a,6-tetrahydro-6-methoxyiminobenzofuran, n.m.r. (CDCl3): δ0.98 (t, J 7.5 Hz, CH2CH2CH3), 1.11 (d, CH3 --3), 1.64 (m, CH2CH2CH3), 2.52 (m, CH2CH2CH3), 3.0 (s, OCH3), 3.84 (s, Ar--OCH3), 4.04 (s, NOCH3), 5.07 (s, H-2), 5.72 (s, H-7) 6.48 (s, H-4), 6.87-7.12 (m, Ar--H)的产率得到(2S,3S,3aS)-2-(3,4-dimethoxyphenyl)-3a-methoxy-3-methyl-5-n-propyl-2,3,3a,6-tetrahydro-6-methoxyiminobenzofuran