Short synthesis of 5,6-dihydro-(S)-4-(ethylamino)-(S)-6-[C.sup.3

Details Short synthesis of 5,6-dihydro-(S)-4-(ethylamino)-(S)-6-[C.sup.3 Short synthesis of 5,6-dihydro-(S)-4-(ethylamino)-(S)-6-[C.sup.3

1994-02-18

1995-08-15

Wu, Shean

Drug, bio-affecting and body treating compositions

Plural fermentates of different origin

514432, 514444, 549 23, 549 53, A61K 5104, A61K 3138, C07D49502

Patent

active

054417228

ABSTRACT:
This invention concerns the short synthesis of 5,6-dihydro-(S)-4-(ethylamino)-(S)-6-[C.sup.3 H.sub.3 ]-4H-thieno [2,3-b]thiopyran-2-sulfonamide 7,7-dioxide and related non-radioactive and radioactive compounds. The key step is the regioselective and stereo-controlled methylation of the C-6 (.alpha.-sulfone) carbanion in the presence of the monoprotected sulfonamide anion.

REFERENCES:
patent: 4968815 (1990-11-01), Blacklock et al.
patent: 5157129 (1992-10-01), Blacklock et al.

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