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| Other names | SK&F 64139, DCTQ. |
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| Formula | C9H9Cl2N |
| Molar mass | 202.08 g·mol−1 |
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SKF-64139 is a tetrahydroisoquinoline (THIQ). It has pharmacology that is described as an inhibitor of phenylethanolamine N-methyltransferase (PNMT). [1] [2] Effects on serotonin (5-HT) and catecholamines is thought to stem from MAOI. [3]
Additionally, SKF-64139 is an alpha-2 blocker [4] that lowers the blood pressure in hypertensive rats. [5] SKF-64139 causes inhibition of guinea pig lordosis behavior. [6]
According to the patent, [7] the tablet strength is formulated to contain 150mg of the API.
Synthesis (Compound #13 See Method A): [1] Patent: [7]
Pomeranz–Fritsch reaction between 2,3-dichlorobenzaldehyde [6334-18-5] (1) and aminoacetaldehyde dimethyl acetal [22483-09-6] (2) gives [57987-75-4] (3). Treatment with acid leads to 7,8-dichloroisoquinoline [61563-36-8] (4). Catalytic hydrogenation completes the synthesis of SKF-64139 (5).