24181-64-4Relevant academic research and scientific papers
A NOVEL AND HIGHLY STEREOSELECTIVE SYNTHESIS OF (+/-)-SIBIRICINE
Hanaoka, Miyoji,Kohzu, Masumi,Yasuda, Shingo
, p. 2621 - 2623 (2007/10/02)
A novel and stereoselective synthesis of (+/-)-sibiricine (1), a spirobenzylisoquinoline alkaloid, from the corresponding protoberberine (3) was developed using photo-oxygenation and photo-isomerization.
TRANSFORMATION OF PROTOBERBERINES INTO SPIROBENZYLISOQUINOLINES. STEREOSELECTIVE CONVERSION OF COPTISINE INTO (+/-)-OCHROBIRINE
Hanaoka, Miyoji,Sakurai, Shun-ichiro,Ohshima, Takeshi,Yasuda, Shingo,Mukai, Chisato
, p. 3446 - 3449 (2007/10/02)
Reduction of the 8,14-cycloberbin-13-one (7a), derived from coptisine, (6a), with LiAlH(OBut)3 gave stereoselectively the alcohol (8a) which was subsequently treated with ethyl chloroformate to afford the oxazolidinone (10a).Hydrolysis of 10a followed by methylation with methyl iodide provided (+/-)-ochrobirine (1a).KEYWORDS - ochrobirine, spirobenzylisoquinoline alkaloid; coptisine; berberine; protoberberine alkaloid; stereoselective reduction; ethyl chloroformate; regioselectivce C8-N bond cleavage; stereoselective transformation
STRUCTURE OF LEDERINE
Israilov, I. A.,Melikov, F. M.,Yunusov, M. S.,Murav'eva, D. A.,Yunusov, S. Yu.
, p. 392 - 393 (2007/10/02)
The new spirobenzylisoquinoline base lederine with mp 208-209 deg C (methanol), D +13 deg (c 0.84; chloroform) has been isolated from Corydalis ledebouriana Kar et Kir and Dicentra peregrina (Rudolphi) Fedde.Its structure has been established om the basis of spectral characteristics and chemical reactions.
