A direct C–H arylation of aminoheterocycles with arylhydrazine hydrochlorides was developed. The reaction proceeds via a homolytic aromatic substitution mechanism involving aryl radicals as the intermediates. The new reaction takes place readily at room temperature in air and in the presence of an inexpensive base. Moreover, the reactivity of this radical arylation correlated with the HOMO energy of
Trifluoromethylpyrrolecarboxamides and Trifluoromethylpyrrolethioamides as fungicides
申请人:——
公开号:US20040171490A1
公开(公告)日:2004-09-02
Novel pyrrole derivatives of formula I
1
wherein
X is oxygen or sulfur;
R
1
is hydrogen, C
1
-C
4
alkyl unsubstituted or substituted, or halogen;
R
2
is C
1
-C
4
alkyl unsubstituted or substituted; and
A is orthosubstituted aryl; orthosubstituted heteroaryl; bicycloaryl unsubstituted or substituted; or bicycloheteroaryl unsubstituted or substituted.
The novel compounds have plant-protective properties and are suitable for protecting plants against infestations by phytopathogenic microorganisms.
Trifluoromethylpyrrolecarboxamides and trifluoromethylpyrrolethioamides as fungicides
申请人:Syngenta Crop Protection, Inc.
公开号:US07109150B2
公开(公告)日:2006-09-19
Novel pyrrole derivatives of formula I
wherein
X is oxygen or sulfur;
R1 is hydrogen, C1–C4alkyl unsubstituted or substituted, or halogen;
R2 is C1–C4alkyl unsubstituted or substituted; and
A is orthosubstituted aryl; orthosubstituted heteroaryl; bicycloaryl unsubstituted or substituted; or bicycloheteroaryl unsubstituted or substituted.
The novel compounds have plant-protective properties and are suitable for protecting plants against infestations by phytopathogenic microorganisms.