Novel echinocandin derivatives, preparation method and use thereof as fungicides
申请人:——
公开号:US20040014602A1
公开(公告)日:2004-01-22
The invention concerns compounds of general formula (I) wherein: R
1
represents a hydrogen atom, a hydroxy radical, Ob or Ncd; A represents an oxygen atom, a CH
2
radical or a NH radical; B represents the radical of a steroid; R
3
represents a hydrogen atom, a methyl or hydroxyl radical; R4 represents a hydrogen atom or a hydroxyl radical; T represents a hydrogen atom, a methyl radical, a CH
1
CONH
2
, CH
2
C≡N radical, a (CH
2
),NH
2
or (CH
2
)
2
Nalk
+
X
−
radical; X being a halogen atom and alc an alkyl radical; Y represents a hydrogen atom, a hydroxyl radical or a halogen atom or a OSO
3
H radical; W represents a hydrogen atom or a OH radical; Z represents a hydrogen atom or a methyl radical. The compounds of formula (I) exhibit antifungal properties.
1
Process for the conversion of echinocandin class of peptides to their c4-homotyrosine monodeoxy analogues
申请人:Aventis Pharma Deutschland GmbH.
公开号:US06809177B1
公开(公告)日:2004-10-26
The invention relates to a process for the conversion of echinocandin class of peptides to their C4-homotyrosine monodeoxy analogues, particularly mulundocandin to deoxymulundocandin, which consists of a single step selective reduction of C4-htyr (homotyrosine) hydroxyl group of echinocandins to their monodeoxy analogues under neutral conditions without prior protection/deprotection of the equally facile C5-Orn (ornithine) hydroxyl group and purification of the monodeoxy compound from the crude reaction mixture.