NL7401637A - Cpds. contg. chroman rings - from hydroquinones and carboxylic acid derivs in the presence of an insol solid acid catalyst - Google Patents

Cpds. contg. chroman rings - from hydroquinones and carboxylic acid derivs in the presence of an insol solid acid catalyst

Info

Publication number
NL7401637A
NL7401637A NL7401637A NL7401637A NL7401637A NL 7401637 A NL7401637 A NL 7401637A NL 7401637 A NL7401637 A NL 7401637A NL 7401637 A NL7401637 A NL 7401637A NL 7401637 A NL7401637 A NL 7401637A
Authority
NL
Netherlands
Prior art keywords
insol
contg
carboxylic acid
hydroquinones
cpds
Prior art date
Application number
NL7401637A
Other languages
Dutch (nl)
Original Assignee
Teijin Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Teijin Ltd filed Critical Teijin Ltd
Priority to NL7401637A priority Critical patent/NL7401637A/en
Publication of NL7401637A publication Critical patent/NL7401637A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
    • C07D311/70—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with two hydrocarbon radicals attached in position 2 and elements other than carbon and hydrogen in position 6
    • C07D311/72—3,4-Dihydro derivatives having in position 2 at least one methyl radical and in position 6 one oxygen atom, e.g. tocopherols

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

In the title reaction a cpd. (I) is reacted with a cpd. (II) (III) or (IV) in the presence of a solid acid which contains an acid whose strength Ho (Hammett) is 1.5, insol in the reaction system. (where R1 and R2 are H or 1-20C org. carboxylic acid radicals, R3 R4 and R5 are H or Me; X and X1 are each different and all halogen, or 1-20C- org. carboxylic acid radicals; Y is H or 1-20C satd. or unsatd. hydrocarbyl). The acid catalyst is pref. silica/alumina of specific surface area of >=1 m2/g pref. 100 m2/g contg. is not 0.25 m mole/g acid of Ho 1.5.
NL7401637A 1974-02-06 1974-02-06 Cpds. contg. chroman rings - from hydroquinones and carboxylic acid derivs in the presence of an insol solid acid catalyst NL7401637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7401637A NL7401637A (en) 1974-02-06 1974-02-06 Cpds. contg. chroman rings - from hydroquinones and carboxylic acid derivs in the presence of an insol solid acid catalyst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7401637A NL7401637A (en) 1974-02-06 1974-02-06 Cpds. contg. chroman rings - from hydroquinones and carboxylic acid derivs in the presence of an insol solid acid catalyst

Publications (1)

Publication Number Publication Date
NL7401637A true NL7401637A (en) 1975-08-08

Family

ID=19820696

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7401637A NL7401637A (en) 1974-02-06 1974-02-06 Cpds. contg. chroman rings - from hydroquinones and carboxylic acid derivs in the presence of an insol solid acid catalyst

Country Status (1)

Country Link
NL (1) NL7401637A (en)

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