公开(公告)号：FR2174269A1

公开(公告)日：1973-10-12

申请号：FR7307476

申请日：1973-03-02

Applicant: STAMICARBON ,  STAMICARBON BV NL

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74 ,  C07D7/18

公开(公告)号：JPS596876B2

公开(公告)日：1984-02-15

申请号：JP2499773

申请日：1973-03-02

Applicant: Stamicarbon

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74

CPC classification number: C07D311/74

公开(公告)号：JPS4899175A

公开(公告)日：1973-12-15

申请号：JP2499773

申请日：1973-03-02

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74

公开(公告)号：CH575408A5

公开(公告)日：1976-05-14

申请号：CH294973

申请日：1973-02-28

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200 DEG C at a temperature of 140 DEG -245 DEG C and a pressure of 6-200 mm Hg.

公开(公告)号：NL174464C

公开(公告)日：1984-06-18

申请号：NL7202745

申请日：1972-03-02

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200 DEG C at a temperature of 140 DEG -245 DEG C and a pressure of 6-200 mm Hg.

公开(公告)号：FR2174269B1

公开(公告)日：1978-02-10

申请号：FR7307476

申请日：1973-03-02

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74 ,  C07D7/18

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200 DEG C at a temperature of 140 DEG -245 DEG C and a pressure of 6-200 mm Hg.

公开(公告)号：GB1349638A

公开(公告)日：1974-04-10

申请号：GB958673

申请日：1973-02-27

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74 ,  C07D7/20

Abstract: 1349638 Preparation of hexahydrocoumarin STAMICARBON BV 27 Feb 1973 [2 March 1972] 9586/73 Heading C2C 3,4,5,6,7,8 - Hexahydrocoumarin is prepared by lactonization of 2, (beta-carboxyethyl)-cyclohexanone by heating on a reaction zone to a temperature of 140-245‹ C. at 6-200 mm. mercury pressure in the presence of a catalytic quantity of a strong acid with an atmospheric boiling point above 200‹ C., and hexahydrocoumarin recovered from the vapour thus formed, e.g. by adjusting the temperature of the vapour to between the boiling point of water and hexahydrocoumarin to form a condensate or by condensing the vapour formed at a temperature below 30‹ C. with the formalin of a two-liquid layer system and separating off the aqueous upper layer.

公开(公告)号：NL174464B

公开(公告)日：1984-01-16

申请号：NL7202745

申请日：1972-03-02

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200 DEG C at a temperature of 140 DEG -245 DEG C and a pressure of 6-200 mm Hg.

公开(公告)号：DE2309536C2

公开(公告)日：1982-01-28

申请号：DE2309536

申请日：1973-02-26

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200 DEG C at a temperature of 140 DEG -245 DEG C and a pressure of 6-200 mm Hg.

公开(公告)号：SE377123B

公开(公告)日：1975-06-23

申请号：SE7302972

申请日：1973-03-02

Applicant: STAMICARBON

Inventor： SCHAFFSMA S E ,  DEUMENS J J M

IPC: C07D311/74

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200 DEG C at a temperature of 140 DEG -245 DEG C and a pressure of 6-200 mm Hg.