13383-12-5Relevant academic research and scientific papers
A new and concise way to enamides by fluoroalkanosulfonyl fluoride mediated Beckmann rearrangement of α,β-unsaturated ketoximes
Yan, Zhaohua,Xu, Yun,Tian, Weisheng
supporting information, p. 7186 - 7189 (2015/02/02)
The reaction of α,β-unsaturated ketoximes with fluoroalkanosulfonyl fluorides in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) underwent the Beckmann rearrangement smoothly to afford the corresponding acid-sensitive enamides in moderate to excellent yields, which provides a new efficient method for the preparation of acid-sensitive enamides.
STEROIDS .LIII. TRANSFORMATION OF 3β-ACETOXY-5α-ANDROSTAN-17-ONE INTO 17α- AND 17β-AMINO DERIVATIVES OF 5α-ANDROSTAN-3β-OL
Nadaraia, N. Sh.,Sladkov, V. I.,Kuleshova, L. N.,Suvorov, N. N.
, p. 481 - 485 (2007/10/02)
The epimeric 17α- and 17β-amino-5α-androstan-3β-ols were synthesized from 3β-acetoxy-5α-androstan-17-one.The configurations at the C17 atom were demonstrated by the 1H NMR method.
Steroids. Part 21. Photorearrangement of Steroidal Nitronate Salts and a N-Butyl Spiro-oxaziridine
Edge, Graham J.,Imam, Syed H.,Marples, Brian A.
, p. 2319 - 2326 (2007/10/02)
Irradiation, at 254 nm, of ethanol solutions of nitro-steroids in the presence of an excess of sodium ethoxide gave a range of products including hydroxamic acids, ketones, and alkenes possibly derived from the anions of the N-hydroxyoxaziridines.Alternatively, the ketones and hydroxamic acids may be derived from the anions of the hydroxy-nitroso compounds.The proportions of products depend on the ring size and stereochemistry and the photoreactions differ significantly from those observed for N-alkyl spiro-oxaziridines including a steroidal N-butyl spiro-oxaziridine.
Process for the preparation of 17β-hydroxy-3-oxo-17α-pregn-4-ene-21-carboxylic acid γ-lactone
-
, (2008/06/13)
A new process utilizing certain novel intermediates for the preparation of 17β-hydroxy-3-oxo-17α-pregn-4-ene-21-carboxylic acid γ-lactone is described herein. The procedure utilizes readily available and inexpensive sarsasaponin as starting material.
