Process for the preparation of bicyclo [2.2.] heptene derivative

Details Process for the preparation of bicyclo [2.2.] heptene derivative Process for the preparation of bicyclo [2.2.] heptene derivative

1982-05-03

1983-12-20

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568352, 568445, 568591, 568 20, C07C 4569

Patent

active

044219350

ABSTRACT:
Process for the preparation of Diels-Alder type adducts by reacting a compound with formula ##STR1## or the corresponding hydrated derivative, wherein R.sup.1, R.sup.2, and R.sup.4 are H or lower alkyl, R.sup.3 is lower alkyl, X is O,S, (O--CR.sup.5 R.sup.6 R.sup.7).sub.2 or ##STR2## wherein R.sup.5, R.sup.6 and R.sup.7 an H or lower alkyl, n is 2-5 and Y is H, alkyl or alkenyl or Y and R.sup.2 together form an alkylene group which may contain one or more substituents, with a cyclopentadiene and/or an oligomer thereof in the presence of an aqueous solution of a strong proton donor having a conjugate with a low nucleophilicity.

REFERENCES:
patent: 2262002 (1941-11-01), Hopff et al.
patent: 3067244 (1962-12-01), Robinson et al.
patent: 3341601 (1967-09-01), Mertzweiller
Bachner et al., Chem. Abst., vol. 95, #115757F (1981).

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