Claims
- 1. In the compound 5-amino-2,4,6,7-tetramethyl -2-(4-phenylpiperidinomethyl) -2,3-dihydrobenzo[b]furan or a salt thereof, the improvement which comprises providing said compound in the form of (S)--(+)-5-amino-2,4,6,7-tetramethyl-2- (4-phenylpiperidinomethyl)-2,3-dihydrobenzo[b]furan or a salt thereof in its crystalline state showing its characteristic peaks at lattice spacings (d) of 13.89, 7.12, 5.36, 4.26, 4.05, 4.00, 3.31, 3.21 in the powder of x-ray diffraction pattern.
- 2. The compound of claim 1 in the form of its hydrochloride.
- 3. (S)--(+)-5-amino-2,4,6,7-tetramethyl-2-(4-phenylpiperidinomethyl) -2,3-dihydrobenzo furan dihydrochloride showing is characteristic peaks at lattice spacings (d) of 13.89, 7.12, 5.36, 4.26, 4.05, 4.00, 3.31, 3.21, in the powder x-ray diffraction pattern.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-329683 |
Dec 1992 |
JPX |
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Parent Case Info
This application is a continuation, of application Ser. No. 08/394,206, filed Feb. 24, 1995, (now abandoned) which is a continuation of Ser. No. 08/164,437, filed on Dec. 9, 1993 (now abandoned).
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Number |
Name |
Date |
Kind |
3547931 |
Kaiser et al. |
Dec 1970 |
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3686188 |
Heubner |
Aug 1972 |
|
5376681 |
Aono et al. |
Dec 1994 |
|
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Number |
Date |
Country |
483772 |
May 1992 |
EPX |
2054619 |
May 1992 |
EPX |
2176782 |
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GBX |
Non-Patent Literature Citations (1)
Entry |
Karrer, Organic Chemistry, Third English Ed., Elsevier Pub. Co., Inc.: New York, pp. 101-103 (1947). |
Continuations (2)
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Number |
Date |
Country |
Parent |
394206 |
Feb 1995 |
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Parent |
164437 |
Dec 1993 |
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