Process for preparing organic sulfur acids or salts thereof
申请人:——
公开号:US20020161255A1
公开(公告)日:2002-10-31
A process for producing organic sulfur acid or a salt thereof of the present invention allows an organic substrate to react with a sulfur oxide in the presence of a metallic compound catalyst and in the absence of N-hydroxy and N-oxo cyclic imide compounds and thereby yields a corresponding organic sulfur acid or a salt thereof. Such organic substrates include, for example, (a) homocyclic or heterocyclic compounds having a methylene group, (b) compounds having a methine carbon atom, (c) compounds having a methyl group or methylene group at the adjacent position to an unsaturated bond, (d) non-aromatic heterocyclic compounds having a carbon-hydrogen bond at the adjacent position to a hetero atom, and (e) straight-chain alkanes. The sulfur oxide includes, for example, sulfur dioxide. This production process can efficiently produce an organic sulfur acid or a salt thereof under mild conditions.
There are disclosed a composition comprising
(E)-1,4-dibromo-2-methyl-2-butene and
(Z)-1,4-dibromo-2-methyl-2-butene, wherein the ratio of the E isomer to the total amount of the E and Z isomers is 0.9 or more; a process for producing the same and a process using the same to produce an allyl halide compound of formula (1):
1
wherein X denotes a bromine atom,
Y denotes an ArS(O)
2
group or an RCOO group,
wherein Ar denotes an aryl group which may be substituted and R denotes a hydrogen atom, a lower alkyl group or an aryl group which may be substituted, and
the wavy line means that the derivative is a mixture of an E or Z geometrical isomer.
Catalyst comprising a cyclic imide compound and process for producing organic compounds using the catalyst
申请人:——
公开号:US20020128149A1
公开(公告)日:2002-09-12
A catalyst includes a cyclic imide compound having an N-substituted cyclic imide skeleton represented by following Formula (I):
1
wherein X is an oxygen atom or a hydroxyl group, and having a solubility parameter of less than or equal to 26 [(MPa)
½
] as determined by Fedors method. The catalyst may further comprise a metallic compound. By allowing (A) a compound capable of forming a radical to react with (B) a radical scavenging compound in the presence of the catalyst, an addition or substitution reaction product between the compound (A) and the compound (B) or a derivative thereof can be obtained.
SYNTHETIC METHOD FOR THE PREPARATION OF 1, 2-BENZISOTHIAZOLIN-3-ONE
申请人:Shouguang Syntech Fine Chemical Co., Ltd.
公开号:US20150336910A1
公开(公告)日:2015-11-26
The present invention relates to a method for producing a 1,2-benzisothiazolin-3-one compound (I) by reacting a 2-halobenzonitrile compound (II) with a thiol compound (III) to form an intermediate (IV) and subsequently reacting the intermediate (IV) with a halogenation agent in the presence of water to form a reaction mixture (RM), comprising the 1,2-benzisothiazolin-3-one compound (I) and a halide compound (V).
A process of the invention allows a cycloalkane to react with oxygen in the presence of a catalytic imide compound having an N-hydroxy (or N-oxo) cyclic imide skeleton and thereby yields a corresponding bis(1-hydroxycycloalkyl)peroxide. The catalytic imide compound includes, for example, a compound represented by following Formula (1):
1
wherein R
1
and R
2
are each, for example, a hydrogen atom, a halogen atom, an alkyl group, an aryl group or a cycloalkyl group, where R
1
and R
2
may be combined to form a double bond, an aromatic or non-aromatic ring; and X is an oxygen atom or a hydroxyl group. The cycloalkane includes, for example, a cycloalkane having from 5 to 15 members. The invention can easily produce bis(1-hydroxycycloalkyl)peroxide from an inexpensive material.