Erycibe obtusifolia

The chemical structure of baogongteng A (1), a new myotic agent from Erycibe obtusifolia, has been determined. High-resolution mass-spectral data indicated the presence of a 3,6-disubstituted tropane skeleton. Infrared and and n.m.r. data indicated the presence of secondary amine, secondary hydroxyl, and acetoxy functions, and the location of the latter group at C-6 was based on comparison of n.m.r. chemical shifts with those of 6B-acetoxy-3a-tropanol. The hydroxyl group was assigned to the 23-position from the n.m.r. spectrum of the N-methylated alkaloid. [Pg.55]

The optically active tropane alkaloid Bao Gong Teng A, isolated from the Chinese herb Erycibe obtusifolia Benth, is an azabicyclo-[3.2.1]octane conpound substituted with an acetate ester and a hydroxyl group. By a regio- and stereocontrolled [5+2] cycloaddition of TpMo(CO)2(q -pyridinyl) scaffold 4 with methyl vinyl ketone 5, the azabicyclo-[3.2.1]octane... [Pg.79]

Erucifoline, 1061 Erwinia uredovora, 1735 Erycibe obtusifolia, 1345 Erythema, 3964... [Pg.4190]

Fang YW, Zhao JJ, Bian ZL (1981) Determination of the structure of Erycibe obtusifolia Bentil s base II - a new medicine for glaucoma. Hua Hsuch Tung Pao 209-210 Fikenscher LH (1960) The occurrence of nicotine in the genus Acacia. Pharm Weekbl 95 233-235... [Pg.195]

Yao T, Chen Z, Yi D, Xu G (1981) Chemical study on Bao Gong-teng (Erycibe obtusifolia Benth.). II. Structure of baogongteng A - a new myotic agent. Yaoxue Xuebao 16 582-588 Yunusov SY, Shakirov TT, Plekhanova NV (1958) Alkaloids of Convolvulus subhirsutus. Doklady Akademii Nauk USSR 10 17-20... [Pg.212]

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