大黄素

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 20 grams of emodin, 1000 mL of acetic acid, 82.8 grams of stannous chloride was heated to reflux. Hydrochloric acid (60 mL) was added slowly in minutes and continued reflux for 1 hour. Remaining 167 mL of HCl was added slowly at reflux and continued for an additional 1 hour. Orange color mixture was cooled to room temperature and left over night. Product was isolated by filtration and washed with water. Finally the product (emodin anthrone) was dried in vacuo at 60° C. to a constant weight to afford 18.1 grams (Yield: 95%) of an orange powder. was heated to reflux continued reflux for 1 hour was added slowly at reflux left over night Product was isolated by filtration washed with water Finally the product (emodin anthrone) was dried in vacuo at 60° C. to a constant weight

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 20 grams of emodin, 1000 mL of acetic acid, 82.8 grams of stannous chloride was heated to reflux. Hydrochloric acid (60 mL) was added slowly in minutes and continued reflux for 1 hour. Remaining 167 mL of HCl was added slowly at reflux and continued for an additional 1 hour. Orange color mixture was cooled to room temperature and left over night. Product was isolated by filtration and washed with water. Finally the product (emodin anthrone) was dried in vacuo at 60° C. to a constant weight to afford 18.1 grams (Yield: 95%) of an orange powder. was heated to reflux continued reflux for 1 hour was added slowly at reflux left over night Product was isolated by filtration washed with water Finally the product (emodin anthrone) was dried in vacuo at 60° C. to a constant weight

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Phytochemistry: The seeds contain tannic acid, mucilage (36%), fatty acid (2.56%), emodin and a toxalbumin. Chrysarobin (methyl-di hydroxy anthranol. M. P. 203-4° C.) has been isolated from the benzene extract of the seeds. The fatty oil contains: saturated fatty acids 19.7; linoleic acid, 31.4; oleic acid 30.7, linolenic acid, 6.3;volatile constituents, 0.7; un sapon matter 7.4%. Pharmacology: All parts of the plant have similar medicinal properties and are considered purgative, tonic, febrifugal, expectorant and diuretic. The plant is used as a vermifuge and to treat sore eyes, haematuria, rheumatism, dropsy, typhoid, asthma, blood disorders and is reportedly effective against leprosy. A decoction of the plant is used for the treatment of hysteria, dysentery and other stomach troubles. The roots are considered bitter, tonic, purgative, anthelmintic and diuretic. In ayurveda a paste made from the roots is considered specific ringworm and other skin ailments. The leaves are also used externally to relieve inflammatory swellings, rheumatism, wounds and sprains. The root bark is used as a quinine substitute to cure fever, and its decoction is used as a stimulant and as a specific medicine for gonorrhoea and hepatic troubles.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 20 grams of emodin, 1000 mL of acetic acid, 82.8 grams of stannous chloride was heated to reflux. Hydrochloric acid (60 mL) was added slowly in minutes and continued reflux for 1 hour. Remaining 167 mL of HCl was added slowly at reflux and continued for an additional 1 hour. Orange color mixture was cooled to room temperature and left over night. Product was isolated by filtration and washed with water. Finally the product (emodin anthrone) was dried in vacuo at 60° C. to a constant weight to afford 18.1 grams (Yield: 95%) of an orange powder. was heated to reflux continued reflux for 1 hour was added slowly at reflux left over night Product was isolated by filtration washed with water Finally the product (emodin anthrone) was dried in vacuo at 60° C. to a constant weight