Detail of "33605-73-1"

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CAS Number:
33605-73-1
Name:
Formamide,N-[(3S)-tetrahydro-2,5-dioxo-3-furanyl]-
Molecular Structure:
Formula:
C5H5 N O4
Molecular Weight:
143.0975
Synonyms:
Asparticanhydride, N-formyl-, L- (8CI); Formamide, N-(tetrahydro-2,5-dioxo-3-furanyl)-,(S)-; N-Formyl-L-aspartic anhydride; N-Formylaspartic anhydride
EINECS:
251-589-8
Density:
1.44 g/cm³
Melting Point:
145-155 °C (dec.)(lit.)
Boiling Point:
486 °C at 760 mmHg
Flash Point:
247.7 °C
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
26-36 Details

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N-formyl-a-L-aspartyl-L-phenylalanine methyl ester: N-formyl-a-L-aspartyl-L-phenylalanine methyl ester. Kato, Toshio; Higuchi, Chojiro; Ora, Takeshi; Mita, Ryuichi; Yamaguchi, Teruhiro (Mitsui Toatsu Chemicals, Inc., Japan). Jpn. Kokai Tokkyo Koho JP 61221199 A2 1 Oct 1986 Showa, 6 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C07K005-06. ICS: C07K001-02.Some commonly used reagents like 33605-76-4 and 33605-73-1 are used in this experiment. APPLICATION: JP 85-60831 27 Mar 1985. DOCUMENT TYPE: Patent CA Section: 34 (Amino Acids, Peptides, and Proteins) Title compd. (I), useful as an intermediate for the sweetener a-L-aspartyl-L-phenylalanine Me ester, was prepd. selectively by addn. of L-phenylalanine Me ester (II) to N-formyl-L-aspartic anhydride (III) in an org. solvent contg. org. sulfonic acids. Thus, a soln. of II in AcOEt was added to a suspension contg. III and CF3SO3H at 20-25° to give, after 1 h, 92.9% I with an a-isomer:b-isomer ratio of compared with 77.0:23.0 (87.9% yield) without CF3SO3H. .

Separation of N-formyl-a-L-aspartyl-L-phenylalanine Me ester: Separation of N-formyl-a-L-aspartyl-L-phenylalanine Me ester. Higuchi, Chojiro; Kato, Toshio; Ora, Takeshi; Mita, Ryuichi; Yamaguchi, Teruhiro (Mitsui Toatsu Chemicals, Inc., Japan). Jpn. Kokai Tokkyo Koho JP 61212597 A2 20 Sep 1986 Showa, 4 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C07K001-14. ICS: C07K005-06.Some commonly used reagents like 33605-73-1 is used in this experiment. ICI: C07K099-00. APPLICATION: JP 85-52385 18 Mar 1985. DOCUMENT TYPE: Patent CA Section: 34 (Amino Acids, Peptides, and Proteins) N-Formyl-a-L-aspartyl-L-phenylalanine Me ester (I), useful as an intermediate for the sweetener a-L-aspartyl-L-phenylalanine Me ester, was sepd. from N-formyl-b-L-aspartyl-L-phenylalanine Me ester (II) by treating alkali metal, alk. earth metal, or ammonium salts of I contg. II with (in)org. Zn salts in water and crystn. of the formed Zn salt of I. Thus, 17% II-contg. I was dissolved in water contg. NaHCO3 and ZnCl2 was added to the soln. at 50°. The soln. was then cooled to 25° to give 80.5% Zn salt of I. .