Transprotection of N-Benzoylated Nucleobase Derivatives by Dialkylaminomethylene Group
摘要:
The use of(chloromethylene)dialkylammonium chloride in selective transprotection of N-benzoylated nucleobase derivatives is reported along with the evaluation of the stability of various protecting groups widely used in nucleoside and/or nucleotide chemistry.
Transprotection of N-Benzoylated Nucleobase Derivatives by Dialkylaminomethylene Group
摘要:
The use of(chloromethylene)dialkylammonium chloride in selective transprotection of N-benzoylated nucleobase derivatives is reported along with the evaluation of the stability of various protecting groups widely used in nucleoside and/or nucleotide chemistry.
secondary carbene palladium(II) complexes (1b–3b) were synthesized via oxidative insertion of Pd2(dba)3 (dba = dibenzylideneacetone) into the C–Cl bond of dialkyl(chloromethylene)ammonium chloride salts ([R2NCHCl]+Cl−). All complexes have been characterized by 1H, 13C, and 31P NMR analysis. X-ray diffraction studies on single crystal of 3b confirm the cis square planar geometry. Complexes (1b–3b) have been
[EN] TRIAZOLOPYRIMIDINE DERIVATIVES<br/>[FR] DERIVES DE TRIAZOLOPYRIMIDINE
申请人:BAYER AGROCHEM KK
公开号:WO2000009508A1
公开(公告)日:2000-02-24
Novel triazolopyrimidine derivatives of formula (I) in which R1, R2, X and Y have the meanings given in the specification, processes for their preparation and their use as fungicides. Intermediates of formulae (II), (V) and (IV) in which R?1, R3, R4, R5¿, X, Y and Z have the meanings given in the specification, and processes for the preparation of the novel intermediates.