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公开(公告)号：DE69706504T2
公开(公告)日：2002-04-25
申请号：DE69706504
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： SHIMIZU IKUO , USAMI TAKESHI , TOYODA HIROSHI , OKAJIMA ASAKO , MATSUSHITA SHOSHIRO
IPC: C07C45/43 , C07C45/63 , C07C49/517 , C07C49/707
Abstract: In the formulae, R represents alkyl; and R , R and X independently represent halogen. The present invention relates to a method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivative of general formula (I).
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公开(公告)号：AU705093B2
公开(公告)日：1999-05-13
申请号：AU2306697
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： SHIMIZU IKUO , USAMI TAKESHI , TOYODA HIROSHI , OKAJIMA ASAKO , MATSUSHITA SHOSHIRO
IPC: C07C45/43 , C07C45/63 , C07C49/517 , C07C49/707
Abstract: In the formulae, R represents alkyl; and R , R and X independently represent halogen. The present invention relates to a method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivative of general formula (I).
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公开(公告)号：AU2306697A
公开(公告)日：1997-10-29
申请号：AU2306697
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： SHIMIZU IKUO , USAMI TAKESHI , TOYODA HIROSHI , OKAJIMA ASAKO , MATSUSHITA SHOSHIRO
IPC: C07C45/43 , C07C45/63 , C07C49/517 , C07C49/707
Abstract: In the formulae, R represents alkyl; and R , R and X independently represent halogen. The present invention relates to a method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivative of general formula (I).
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Patent Agency Ranking
公开(公告)号：CA2223772C
公开(公告)日：2006-01-10
申请号：CA2223772
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： USAMI TAKESHI , SHIMIZU IKUO , OKAJIMA ASAKO , TOYODA HIROSHI , MATSUSHITA SHOSHIRO
IPC: C07C45/63 , C07C45/43 , C07C49/517 , C07C49/707
Abstract: (see formula I and II) In the formulae, R1 represents alkyl; and R2, R3 and X independently represent halogen. The present invention relates to a method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivative of general formula (I).
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公开(公告)号：AT205178T
公开(公告)日：2001-09-15
申请号：AT97915678
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： SHIMIZU IKUO , USAMI TAKESHI , TOYODA HIROSHI , OKAJIMA ASAKO , MATSUSHITA SHOSHIRO
IPC: C07C45/43 , C07C45/63 , C07C49/517 , C07C49/707
Abstract: In the formulae, R represents alkyl; and R , R and X independently represent halogen. The present invention relates to a method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivative of general formula (I).
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6.发明公开
公开(公告)号：EP0842919A4
公开(公告)日：1999-02-03
申请号：EP97915678
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： SHIMIZU IKUO , USAMI TAKESHI , TOYODA HIROSHI , OKAJIMA ASAKO , MATSUSHITA SHOSHIRO
IPC: C07C45/43 , C07C45/63 , C07C49/517 , C07C49/707
CPC classification number: C07C49/707 , C07C45/43 , C07C45/63 , C07C49/517
Abstract: A process for the preparation of 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivatives of general formula (I), wherein R1 is alkyl; and R2, R3 and X are each independently halogeno.
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公开(公告)号：DE69706504D1
公开(公告)日：2001-10-11
申请号：DE69706504
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： SHIMIZU IKUO , USAMI TAKESHI , TOYODA HIROSHI , OKAJIMA ASAKO , MATSUSHITA SHOSHIRO
IPC: C07C45/43 , C07C45/63 , C07C49/517 , C07C49/707
Abstract: In the formulae, R represents alkyl; and R , R and X independently represent halogen. The present invention relates to a method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivative of general formula (I).
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公开(公告)号：CA2223772A1
公开(公告)日：1997-10-16
申请号：CA2223772
申请日：1997-04-02
Applicant: KYOWA YUKA KK
Inventor： OKAJIMA ASAKO , TOYODA HIROSHI , USAMI TAKESHI , MATSUSHITA SHOSHIRO , SHIMIZU IKUO
IPC: C07C45/43 , C07C45/63 , C07C49/517 , C07C49/707
Abstract: A process for the preparation of 3,4-dihydroxy-3-cyclobutene-1,2-dione of general formula (II) by hydrolyzing 3-alkoxy-2,2,4,4-tetrahalogenocyclobutanone derivatives of general formula (I), wherein R1 is alkyl; and R2, R3 and X are each independently halogeno.
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