摘要:
The present invention relates to a process and a reagent useful for the synthesis of sulphanilide which is perhalogenated on the carbon borne by the sulphur atom of the sulphanilide function. This persulphonylation process is characterized in that it comprises a step of placing a nucleophile, whose nucleophilic atom is a nitrogen, in contact with a reagent comprising, for successive or simultaneous addition, a heavy halide of sulphonyl, advantageously sulphonyl chloride, and an organic base comprising a trivalent atom from column V whose lone pair is conjugated directly or indirectly to a bond, and in that the organic part of the said sulphonyl is perhalogenated, advantageously perfluorinated, on the carbon borne by the sulphur. Application to the synthesis of intermediates for organic chemistry.
摘要:
Compositions suitable as replacements for sulfurized sperm oil as extreme pressure additives in lubricants are obtained by sulfurizing a mixture of at least one fatty acid ester (preferably an oil such as soybean oil), at least one C.sub.8 -.sub.36 aliphatic olefin (preferably an .alpha.-olefin), and, optionally, at least one fatty acid (preferably unsaturated).
摘要:
Compositions suitable as replacements for sulfurized sperm oil as extreme pressure additives in lubricants are obtained by sulfurizing a mixture of at least one fatty acid ester (preferably an oil such as soybean oil), at least one C8 36 aliphatic olefin (preferably an Alpha -olefin), and, optionally, at least one fatty acid (preferably unsaturated).
摘要:
SULFUR-CONTAINING COMPOSITIONS CHARACTERIZED BY THE PRESENCE OF AT LEAST ONE CYCLOALIPHATIC GROUP WITH AT LEAST TWO NUCLEAR CARBON ATOMS OF ONE CYCLOALIPHATIC GROUP OR TWO NUCLEAR CARBON ATOMS OF DIFFERENT CYCLOALIPHATIC GROUPS JOINED THROUGH A DIVALENT SULFUR LINKAGE. THE SULFUR LINKAGE CONTAINS AT LEAST TWO SULFUR ATOMS. SULFURIZED DIELS ALDER ADDUCTS ARE ILLUSTRATIVE OF THE COMPOSITIONS DISCLOSED. THESE SULFUR-CONTAINING COMPOSITIONS ARE PARTICULARLY USEFUL AS EXTREME PRESSURE AND ANTIWEAR ADDITIVES IN VARIOUS LUBRICATING OILS.
摘要:
A process for transforming a group >C═O (I) in a compound into a group >C═S (II) or into a tautomeric form of group (II) in a reaction giving a thionated reaction product, by use of crystalline P2S5.2 C5H5N as a thionating agent. A thionating agent which is crystalline P2S5.2 C5H5N.
摘要翻译:在化合物中将C = O(I)的基团转化成组> C = S(II)的基团或通过使用结晶P2S5在产生硫酸化反应产物的反应中变成互变异构形式的基团(II)的方法 .2 C5H5N作为硫化剂。 结晶P2S5.2 C5H5N的硫化剂。
摘要:
The present invention relates to a process and a reagent useful for the synthesis of sulphanilide which is perhalogenated on the carbon borne by the sulphur atom of the sulphanilide function. This persulphonylation process is characterized in that it comprises a step of placing a nucleophile, whose nucleophilic atom is a nitrogen, in contact with a reagent comprising, for successive or simultaneous addition, a heavy halide of sulphonyl, advantageously sulphonyl chloride, and an organic base comprising a trivalent atom from column V whose lone pair is conjugated directly or indirectly to a bond, and in that the organic part of the said sulphonyl is perhalogenated, advantageously perfluorinated, on the carbon borne by the sulphur. Application to the synthesis of intermediates for organic chemistry.