- Preparation method of 3-hydroxymethylene benzofuran-2(3H)-one and azoxystrobin intermediates
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The invention relates to the field of bactericides, and discloses a preparation method of 3-hydroxymethylene benzofuran-2(3H)-one and 3-(alpha-methoxy)-methylene benzofuran-2(3H)-one. The structure of the 3-hydroxymethylene benzofuran-2(3H)-one is as shown in a formula (2). The method comprises the following steps carrying out contact reaction on a compound with a structure as shown in a formula (1) and CO to obtain the compound with the structure as shown in the formula (2). The method provided by the invention is clean in process condition, low in reaction raw material cost and easy to industrialize, and can realize the purpose of green generation;.
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Paragraph 0005; 0040-0045; 0047-0048
(2021/06/23)
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- Process for the preparation of 3-(α-methoxy)methylenebenzofuranones and intermediates therefor
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Compounds of the formula STR1 wherein R1, R2, R3 and R4 are independently hydrogen, halogen, C1-4 alkyl, C1-4 alkoxy, acetoxy or acyl, and processes for preparing the same.
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