Method of making 2-alkoxy-2,3-dihydro-benzofuran-5-ols and their

Details Method of making 2-alkoxy-2,3-dihydro-benzofuran-5-ols and their Method of making 2-alkoxy-2,3-dihydro-benzofuran-5-ols and their

1977-07-05

1978-05-23

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26034671, 26034673, C07D30783

Patent

active

040910334

ABSTRACT:
Compounds of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each is selected from the group consisting of hydrogen, an alkyl group and together, an alkylene chain; M is alkyl of 1 to 6 carbon atoms; and R.sub.6 is selected from the group consisting of hydrogen and R.sub.5 SO.sub.2 -- wherein R.sub.5 is alkyl of 1 to 6 carbon atoms, are prepared by a procedure in which the key step is reacting benzoquinone with an enamine R.sub.1 R.sub.2 C.dbd.CHNR.sub.d 3 R.sub.4 in the presence of a compound of the formula R.sub.1 R.sub.2 CHCHO. The product contains a lower proportion of hydroquinone impurity and is useful as a herbicide.

REFERENCES:
patent: 3412109 (1968-11-01), Skaletsky
patent: 3689507 (1972-09-01), Gates et al.

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