申请人:Pitterna Thomas
公开号:US20080076920A1
公开(公告)日:2008-03-27
The present disclosure is directed to a process for the preparation of a compound having the formula:
wherein
R is unsubstituted or substituted C
1
-C
12
alkyl, unsubstituted or substituted C
2
-C
4
alkenyl, unsubstituted or substituted C
2
-C
4
alkynyl, unsubstituted or substituted C
3
-C
6
cycloalkyl, unsubstituted or substituted aryl, unsubstituted or substituted heteroaryl, or —SR
1
;
R
1
is unsubstituted or substituted C
1
-C
12
alkyl, unsubstituted or substituted C
2
-C
4
alkenyl, unsubstituted or substituted C
2
-C
4
alkynyl, unsubstituted or substituted cycloalkyl, unsubstituted or substituted aryl or unsubstituted or substituted heteroaryl; and X is a selected leaving group that is not halogen, and may specifically be methylsulfonate, trifluoromethylsulfonate, and p-toluenesulfonate.
These compounds are valuable intermediates useful in the synthesis of compounds having pesticidal activity. Generally, the process includes reacting a water-removing reagent, with a compound having the formula
Water-removing agents that may be used include thionyl chloride (SOCl
2
), thionyl bromide (SOBr
2
), phosphorus oxychloride (POCl
3
), phosphorus oxybromide (POBr
3
), phosphorus pentachloride or a sulfonic acid chloride or bromide.
本公开涉及一种制备具有以下式子的化合物的方法:
其中,
R是未取代或取代的C1-C12烷基,未取代或取代的C2-C4烯基,未取代或取代的C2-C4炔基,未取代或取代的C3-C6环烷基,未取代或取代的芳基,未取代或取代的杂环芳基或—SR1;
R1是未取代或取代的C1-C12烷基,未取代或取代的C2-C4烯基,未取代或取代的C2-C4炔基,未取代或取代的环烷基,未取代或取代的芳基或未取代或取代的杂环芳基;
X是一种选择的离去基团,不是卤素,可能具体是甲磺酸酯,三氟甲基磺酸酯和对甲苯磺酸酯。
这些化合物是有价值的中间体,可用于合成具有杀虫活性的化合物。通常,该方法包括将去水剂与具有以下式子的化合物反应:
可用的去水剂包括亚磺酰氯(SOCl2),亚磺酰溴(SOBr2),氯化氧磷(POCl3),溴化氧磷(POBr3),五氯化磷或磺酸氯或溴。