beta-DIHYDROFURAN DERIVING COMPOUND, METHOD FOR PRODUCING beta-DIHYDROFURAN DERIVING COMPOUND OR beta-TETRAHYDROFURAN DERIVING COMPOUND, beta-GLYCOSIDE COMPOUND, METHOD FOR PRODUCING beta GLYCOSIDE COMPOUND, AND METHOD FOR PRODUCING 4'-ETHYNYL D4T AND ANALOGUE COMPOUNDS THEREOF
申请人:Iriyama Yusuke
公开号:US20120322995A1
公开(公告)日:2012-12-20
The invention provides a process for producing a β-dihydrofuran derivative represented by formula (1) or a β-tetrahydrofuran derivative represented by formula (4), characterized in that the process includes causing a dialkyl dicarbonate, a diaralkyl dicarbonate, or a halide to act on a diol compound represented by formula (2) or (3). The invention also provides a process for producing 4′-ethynyl-2′,3′-didehydro-3′-deoxythymidine or an analog thereof, the process including glycosylation and deprotection.
(2-Hydroxyphenylmethylene)bis(phosphine oxides): a facile rearrangement into 2-(phosphinylmethyl)phenyl phosphinates
作者:Alexander N. Bovin、Alla N. Yarkevich、Alexander V. Kharitonov、Eugene N. Tsvetkov
DOI:10.1039/c39940000973
日期:——
(2-Hydroxyphenylmethylene)bis(phosphine oxides)3 prepared from 2-(diphenylphosphinylmethyl)phenyl phosphinates 2 by oxygen-to-carbon 1,4-phosphinyl migration easily rearrange back into a mixture of 2-(phosphinylmethyl)phenyl phosphinates 2 and 4 under basic conditions or upon heating.
Process for preparing enamine derivatives, compounds so produced and process for preparing a 3-hydroxy-cephalosporin
申请人:Lilly Industries Limited
公开号:EP0019401A1
公开(公告)日:1980-11-26
There is described a process for preparing an enamine of formula (IX):
where R2 is a carboxylic acid protecting group and R3 is the residue of a carboxylic acid derived acyl group and where R5 and R6 are the same or different C1-4 alkyl or C7-10 aralkyl groups; or taken together with the adjacent nitrogen atom form a heterocyclic ring containing from 4 to 8 carbon atoms and optionally a further heteroatom selected from oxygen and nitrogen; by reacting a compound of formula (XII) :
with an amine of formula HNR5R6, the reactant of formula (XII) being prepared by reaction of an appropriate enol derivative with a phosphorus reagent. The enamines of formula (IX) are useful in the preparation of 3-hydroxycephalosporins.