D-Tryptophan methyl ester hydrochloride
- CAS NO.:14907-27-8
- Empirical Formula: C12H15ClN2O2
- Molecular Weight: 254.71
- MDL number: MFCD00038992
- EINECS: 639-469-7
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-10-25 16:21:11
What is D-Tryptophan methyl ester hydrochloride?
Chemical properties
Off-White Crystalline Solid
The Uses of D-Tryptophan methyl ester hydrochloride
D-Tryptophan Methyl Ester Hydrochloride is an intermediate in the synthesis of Tryptophan derivatives.
The Uses of D-Tryptophan methyl ester hydrochloride
Intermediate for the synthesis of Tryptophan derivatives.
What are the applications of Application
D-Tryptophan Methyl Ester Hydrochloride is an intermediate in the synthesis of Tryptophan derivatives
What are the applications of Application
The Pictet–Spengler reaction of D-Tryptophan methyl ester hydrochloride with piperonal in various solvents has been extensively studied, the solvent-dependence of stereoselectivities could be principally attributed to the solubility difference between cis and trans products 5-HCl in the used solvent, the best stereoselectivity (cis/trans = 99:1) was obtained using nitromethane or acetonitrile as the solvent. Cialis, 12a-epi-Cialis, deuterium-labeled, 3,3,12a-d3-Cialis, and 3,3,12a-d3-12a-epi-Cialis could be efficiently synthesized from D-Tryptophan methyl ester hydrochloride[1].
Synthesis
D-tryptophan and methyl sulfonate are reacted in a solvent at 25 to 100°C to generate D-tryptophan methyl ester sulfonate. Dissolve the obtained D-tryptophan methyl ester sulfonate in water and adjust the pH to alkaline with alkali to convert it into D-tryptophan methyl ester. After the reaction, extract with an organic solvent, add a desiccant for dehydration, and obtain an extract containing D-tryptophan methyl ester. Finally, dry hydrogen chloride gas is passed into the obtained extract containing D-tryptophan methyl ester for reaction to obtain D-tryptophan methyl ester hydrochloride.
References
[1] Xiao-Xin Shi. “Highly stereoselective Pictet–Spengler reaction of d-tryptophan methyl ester with piperonal: convenient syntheses of Cialis (Tadalafil), 12a-epi-Cialis, and their deuterated analogues.” Tetrahedron, asymmetry 19 4 (2008): Pages 435-442.
Properties of D-Tryptophan methyl ester hydrochloride
Melting point: | 213-216 °C(lit.) |
Density | 1.337g/cm3 at 20℃ |
refractive index | -19 ° (C=5, MeOH) |
storage temp. | Keep in dark place,Sealed in dry,Room Temperature |
solubility | DMSO, (Slightly), Methanol (Slightly), Water (Slightly) |
form | Solid |
color | White to Off-White |
optical activity | [α]20/D 18°, c = 5 in methanol |
Water Solubility | Soluble in water (150 mg/ml), dimethyl sulfoxide and methanol (50 mg/ml). |
InChI | InChI=1/C12H14N2O2.ClH/c1-16-12(15)10(13)6-8-7-14-11-5-3-2-4-9(8)11;/h2-5,7,10,14H,6,13H2,1H3;1H/t10-;/s3 |
CAS DataBase Reference | 14907-27-8(CAS DataBase Reference) |
Safety information for D-Tryptophan methyl ester hydrochloride
Signal word | Warning |
Pictogram(s) |
Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. |
Computed Descriptors for D-Tryptophan methyl ester hydrochloride
InChIKey | XNFNGGQRDXFYMM-MEQOOBBNNA-N |
SMILES | C12C=CC=CC=1NC=C2C[C@@H](N)C(=O)OC.Cl |&1:10,r| |
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