Method for preparing 7,8-dichloro-1,2,3,4-tetrahydroisoquinoline

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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546141, 260558R, C07D21706

Patent

active

042007542

ABSTRACT:
A novel process for preparing 7,8-dichloro-1,2,3,4-tetrahydroisoquinoline by cyclizing N-acetyl-2,3-dichlorobenzylaminoacetaldehyde dimethyl acetal with a Lewis acid, reducing, and hydrolyzing the resulting acylated isoquinoline is disclosed.

REFERENCES:
patent: 3939164 (1976-02-01), Kaiser et al.
Elderfield, "Heterocyclic Compounds" (1952) vol. 4, pp. 369-672, 392-393.
Birch et al., "Chemical Society Journal", (1974) p. 2185 ff.

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