通过简单,有效且对环境有益的方法将各种硫化物选择性氧化为亚砜是首要目标。在本文中,我们探索了一种高效的方案,用于在70%t存在下将La 2 O 3催化的烷基芳基硫醚氧化为亚砜的高选择性。-BuOOH溶液(水)。我们主要获得单加氧产物。在这些条件下未观察到硫化物过度氧化为砜。在不使用配体和其他添加剂的情况下,在合理的时间内以良好至极好的收率获得了所得产物。用烯丙基硫未观察到双键的环氧化以及烯丙基氧化。可以通过改变反应条件来定量获得砜。通过XRD,AFM和SEM技术对表面形貌和催化剂的可重复使用性进行了验证。使用BET等温线测量La 2 O 3的表面积。
A new methodology for the oxidation of sulfides with Fe(III) catalysts
作者:Debashis Chakraborty、Payal Malik、Vinod Kumar Goda
DOI:10.1002/aoc.1859
日期:2012.1
A variety of sulfides were converted to the corresponding sulfoxide derivatives with 70% t‐BuOOH (water) as the oxidant in the presence of catalytic quantity of Fe2(SO4)3. The method described has a wide range of applications, involves simple work‐up, exhibits chemoselectivity/enantioselectivity and proceeds under mild reaction conditions. The resulting products are obtained in good yield within a
Benzo(b)thiophene derivatives and process for producing the same
申请人:——
公开号:US20030176490A1
公开(公告)日:2003-09-18
The present invention is 3,4-disubstituted-benzo[b]thiophene derivatives represented by general formula (I) and processes for preparing compounds represented by general formula (V) from compounds represented by general formula (IV), preparing a mixture of compounds represented by the following formula (II) and the following formula (III) and preparing the benzo[b]thiophene derivatives represented by the above formula (I).
1
wherein, R
1
and R
2
represent each a halogen atom, a trihalomethyl group, a C
1-4
alkyl group or a C
14
alkoxy group; X represents a hydroxy group or a halogen atom; R
3
and R
4
represent each a hydrogen or a halogen atom, a trihalomethyl group, a C
1-4
alkyl group or a C
1-4
alkoxy group; and R
5
represents a C
1-3
alkyl group or a trifluoromethyl group.
BENZO b]THIOPHENE DERIVATIVE AND PROCESS FOR PRODUCING THE SAME
申请人:TEIJIN LIMITED
公开号:EP1362854A1
公开(公告)日:2003-11-19
The present invention is 3,4-disubstituted-benzo[b]thiophene derivatives represented by general formula (I) and processes for preparing compounds represented by general formula (V) from compounds represented by general formula (IV), preparing a mixture of compounds represented by the following formula (II) and the following formula (III) and preparing the benzo[b]thiophene derivatives represented by the above formula (I).
wherein, R1 and R2 represent each a halogen atom, a trihalomethyl group, a C1-4 alkyl group or a C1-4 alkoxy group; X represents a hydroxy group or a halogen atom; R3 and R4 represent each a hydrogen or a halogen atom, a trihalomethyl group, a C1-4 alkyl group or a C1-4 alkoxy group; and R5 represents a C1-3 alkyl group or a trifluoromethyl group.
The present invention provides 3,4-Disubstituted-benzo[b]thiophene derivatives represented by the following formula (I):
wherein, R1 represents a halogen atom, a trihalomethyl group, a C1-4 alkyl group or a C1-4 alkoxy group; and X represents a halogen atom; with the proviso that the compound is not 3-bromomethyl-4-methoxybenzo[b]thiophene, 3-bromomethyl-4-chlorobenzo[b]thiophene, 3-bromomethyl-4-bromobenzo[b]thiophene or 3-bromomethyl-4-fluorobenzo[b]thiophene.