142785-61-3Relevant articles and documents
An Improved Procedure for Retro-Cycloaddition of Adducts from Steroidal 5,7-Dienes and 4-Phenyl-1,2,4-triazoline-3,5-dione
Kubodera, Noboru,Miyamoto, Katsuhito,Watanabe, Hiroyoshi,Kato, Masahiro,Sasahara, Kazuo,Ochi, Kiyoshige
, p. 5019 - 5020 (1992)
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Industrial synthesis of maxacalcitol, the antihyperparathyroidism and antipsoriatic vitamin D3 analogue exhibiting low calcemic activity
Shimizu, Hitoshi,Shimizu, Kazuki,Kubodera, Noboru,Mikami, Tetsuhiro,Tsuzaki, Kaname,Suwa, Hiroyuki,Harada, Koji,Hiraide, Akira,Shimizu, Motoki,Koyama, Kaichiro,Ichikawa, Yoshihide,Hirasawa, Daisuke,Kito, Yasushi,Kobayashi, Mio,Kigawa, Masaharu,Kato, Masahiro,Kozono, Toshiro,Tanaka, Hideki,Tanabe, Makoto,Iguchi, Masanori,Yoshida, Mitsutaka
, p. 278 - 287 (2012/12/24)
Maxacalcitol, the 22-oxa-derivative of 1α,25-dihydroxyvitamin D 3 and used currently as an antihyperparathyroidism and antipsoriatic drug, has been synthesized in seven chemical steps from 1α- hydroxydehydroepiandrosterone on the basis of our previously developed route. The present synthesis allows the production of the protected form of the penultimate intermediate in 26% overall yield in a kilogram scale reaction employing neither difficult reaction conditions nor chromatographic purification, having overcome all the difficulties involved in the previous route.
22-oxacholecalciferol derivative and process for preparing the same
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, (2008/06/13)
A 22-oxacholecalciferol derivative represented by formula (I): STR1 wherein R1 represents a hydrogen atom or a hydroxyl group; and R2 and R3, which may be the same or different, each represent a lower alkyl group having fr