二芳基的水解的动力学(酰氨基)(酰氧基)螺-λ 4 -sulfanes(2A-E,3-5),导致亚砜已被伪一级条件下在二恶烷-水混合物或水性缓冲溶液的影响。起始螺-λ4-硫烷的4的羧酸盐型偶极结构得到红外光谱数据的支持。溶剂的极性和离子强度对化合物2a和3吸电子的水解的速率没有影响显著对-取代基促进在中性反应(ρ 1.43)和酸性介质(ρ猫0.90)。由于底物的负极化酰氧基的质子化,强酸适度地加速了水解。在50∶50(v / v)二恶烷-H 2 O(D 2 O)中,主要的氘同位素效应为k H 2 O / k D 2 O 3.68。螺-λ 4 -sulfanes 2A-E和3与五元含N环比六元类似物更加反应性的4和5涉及的正极化硫水的速度决定的亲核攻击的机构提出了原子,同时伴随有OH和S-N键断裂。螺λ 4-sulfanes 4和5与六元含N螺环,其是反应性略微朝水,经历与OH快速平行反应-
Herbicidal 3 -heterocyclic substituted benzisothiazole and benzisoxazole compounds
申请人:Intellectual Property Department BASF Aktiengesellschaft
公开号:US20020028748A1
公开(公告)日:2002-03-07
There are provided 3-heterocyclic substituted benzisothiazole and benzisoxazole compounds having the structural formula I
1
where Q, X, X
1
and Z are defined as in claim 1. Further provided are compositions and methods comprising those compounds for the control of undesirable plant species.
Process for the preparation of 6-(perfluoroalkyl) uracil compounds from
申请人:American Cyanamid Company
公开号:US06140270A1
公开(公告)日:2000-10-31
An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I ##STR1## from 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula II ##STR2##
Process for the preparation of 6-(perfluoroalkyl) uracil compounds form urea compounds
申请人:American Cyanamid Company
公开号:US06191275B1
公开(公告)日:2001-02-20
An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I
from urea compounds having the structural formula II
从具有结构式II的尿素化合物中制备具有结构式I的6-(全氟烷基)尿嘧啶化合物的改进过程
Processes and intermediate compounds for the preparation of 2-(N,N-disubstituted) amino-4-(perfluoroalkyl)-1, 3- oxazin-6-one and 6-(perfluoroalkyl) uracil compounds
申请人:BASF Aktiengesellschaft
公开号:US06355796B1
公开(公告)日:2002-03-12
An improved process and intermediate compounds for the preparation of 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula I
and an improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula V