公开(公告)号：US3850963A

公开(公告)日：1974-11-26

申请号：US33511473

申请日：1973-02-23

Applicant: STAMICARBON

Inventor： THOMA J ,  DEUMENS J ,  VERHEIJEN E

IPC: B01J23/00 ,  C07B61/00 ,  C07D311/20 ,  C11B9/00 ,  C07D7/26

CPC classification number: C07D311/20 ,  C11B9/008

Abstract: 2-(O=),3-R1,4-R2,5-R3,6-R4,7-R5,8-R6-5,6,7,8-TETRAHYDRO-

CHROMAN

WHEREIN EACH OF R2, R2, R3, R4, R5 AND R6 EACH INDEPENDENTLY REPRESENTS HYDROGEN OR A LOWER ALKYL, PROVIDED THAT THE TOTAL NUMBER OF CARBON ATOMS OF THE R1-R6 SUBMARIN COMPOUND FROM THE REACTION MIXTURE.
1. PROCESS FOR THE PREPARATION OF COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF DIHYDROCOUMARIN AND ALKYL SUBSTITUTED DERIVATIVES OF DIHYDROCOUMARIN COMPRISING HEATING TO A TEMPERATURE OF ABOUT 150 TO ABOUT 400*C. IN THE PRESENCE OF A CATALYST AMOUNT OF A DEHYDRATION CATALYST SELECTED FROM THE GROUP CONSISTING OF PALLADIUM, A COMPOUND OF THE FORMULA:

公开(公告)号：US3856819A

公开(公告)日：1974-12-24

申请号：US37250773

申请日：1973-06-22

Applicant: STAMICARBON

Inventor： DEUMENS J ,  VERHEIJEN E ,  THOMA J

IPC: B01J23/00 ,  C07B61/00 ,  C07D311/08 ,  C07D311/10 ,  C07D311/14 ,  C07D7/26

CPC classification number: C07D311/08

Abstract: Coumarin, a useful flavoring agent resembling vanilla beans, is produced by contacting dihydrocoumarin with a small quantity of a dehydrogenation catalyst such as palladium or platinum at elevated temperatures, optionally in the presence of oxygen. The alkylated dihydrocoumarin compounds may also be processed according to the disclosed procedure to produce the corresponding alkyl substituted products.

Abstract translation: 香豆素是一种类似香草豆的有用调味剂，可通过任选在氧气存在下使二氢香豆素与少量脱氢催化剂如钯或铂在升高的温度下接触来生产。 烷基化的二氢香豆素化合物也可以根据所公开的方法进行处理以产生相应的烷基取代的产物。