バシシン 化學特性,用途語,生産方法
解説
(R)-1,2,3,9-tetrahydropyrrolo[2,1-b]quinazolin-3-ol．C11H12N2O(188.23)．ペガニンともいう．キツネノゴマ科Alhatoda vasia，ハマビシ科Peganum harmalaに含まれるキナゾリンアルカロイド．(S)-バシシンは白色の針狀晶．融點212 ℃．[α]14D－254°(クロロホルム)．有機溶媒に可溶，水に難溶．酸性で徐々にラセミ化する．マメ科Galega officinalisには(S)-バシシンが含まれており，(RS)-バシシンは融點209 ℃，[α]24D＋203°で合成されている．森北出版「化學辭典（第2版）
説明
This quinazoline alkaloid was first isolated from the leaves of Adhatoda vasica
Nees by Hooper and subsequently discovered in Peganum harmala under the
name Peganine. The base is optically inactive although Spath and Kesztler have
reported the isolation of the (-)-form from the fresh leaves of A. vasica and
Rosenfeld and Kolesnikow have obtained the same form from the flowers and
stems of Peganum harmala. The salts are readily obtained crystalline, e.g. the
hydrochloride dihydrate, m.p. 208°C (dry); hydriodide dihydrate, m.p. 195°C
(dry); picrate, m.p. 199°C (dec.) and the methiodide, m.p. 187°C.
With AcOH, the alkaloid gives an anomalous acetyl derivative, m.p. 165°C,
subsequently shown to be N-acetylpedadiene. Oxidation with KMn04 gives
4-quinazolone and 4-keto-3 :4-dihydroxyquinazolyl-3-acetic acid, the latter
characterized as the methyl ester, m.p. 152°C.
The crude drug from A. vasica is used in India as a remedy for asthma while
the pure alkaloid acts as a bronchodilator.
化學的特性
White needle-like crystals, soluble in organic solvents such as methanol, ethanol, DMSO, etc., derived from camels.
參考文獻
Hooper., Pharm. J., 18,841 (1888)
Sen, Ghose.,J. Ind. Chem. Soc., 1,315 (1924)
Ghose., ibid, 4, 1 (1927)
Spath, Nakawitz., Ber., 67,45 (1934)
Spath, Kuffner., ibid, 67, 1494 (1934)
Narang, Ray., Chem. & Ind., 53,698 (1934)
Hanford, Liang, Adams., J. Amer. Chem. Soc., 56, 2780 (1934)
Ghoseetal., ibid, 57,921,951 (1935)
Rosenfeld, Kolesnikov., Ber., 69, 2022 (1936)
Pharmacology:
Chopra., Ind. Med. Gaz., 60, 354 (1925)
Tutaev, Makarova., Trans. Ukraine Inst. Exp. Pharm., 1,32 (1938)
バシシン 上流と下流の製品情報
原材料
準備製品