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Cas Database

Name	N-(tert-Butoxycarbonyl)-L-alanine	EINECS	239-847-8
CAS No.	15761-38-3	Density	1.126 g/cm³
PSA	75.63000	LogP	1.37510
Solubility	N/A	Melting Point	79-83 °C(lit.)
Formula	C₈H₁₅NO₄	Boiling Point	320.9 °C at 760 mmHg
Molecular Weight	189.211	Flash Point	147.9 °C
Transport Information	N/A	Appearance	White to off-white microcrystalline powder
Safety	24/25-36-26	Risk Codes	20/21/22-36/37/38
Molecular Structure		Hazard Symbols	Xi,Xn
Synonyms	(2S)-2-(tert-butoxycarbonylamino)propanoate;Boc-Ala-OH;Boc-L-alanine;BOC-L-Ala-OH;N-t-BOC-L-Alanine;N-[(1,1-dimethylethoxy)carbonyl]-L-alanine;N-Boc-L-alanine;Boc-Alanine-OH;N-Alpha-T-Boc-L-Alanine;Boc-β-Ala-OH;	Article Data	232

N-(tert-Butoxycarbonyl)-L-alanine Synthetic route

: 28875-17-4
(S)-N-(tert-butoxycarbonyl)alanine methyl ester

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With 4-methyl-morpholine In water; acetonitrile at 30℃; under 7500600 Torr; for 96h;	100%
With sodium hydroxide In acetone

: 56-41-7
L-alanin

: 24424-99-5
di-tert-butyl dicarbonate

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
In 1,4-dioxane; water at 0 - 20℃; for 1h;	100%
With sodium hydroxide In tetrahydrofuran; water at 20℃; for 17h;	100%
With sodium hydroxide In tetrahydrofuran; water at 0 - 30℃; for 4.5h;	98%

Boc-L-Ala-Pac-polystyrene resin: Boc-L-Ala-Pac-polystyrene resin

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With bis(tri-n-butyltin)oxide In 1,2-dichloro-ethane at 83℃; for 25h;	100%

N-Boc-Ala-Wang resin: N-Boc-Ala-Wang resin

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With trimethyltin(IV) hydroxide In 1,2-dichloro-ethane for 9h; Heating;	100%

: 139119-46-3
tert-Butyl (2R,4S)-4-Methyl-5-oxo-2-phenyloxazolidine-3-carboxylate

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With lithium hydroxide In tetrahydrofuran; water at 0℃; for 0.333333h;	97%

: 56-41-7
L-alanin

: 75844-68-7
tert-butyl 2-oxo-1,3-oxazole-3(2H)-carboxylate

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With dmap In 1,4-dioxane; water Ambient temperature;	96%
With dmap; triethylamine In 1,4-dioxane; water for 15h; Ambient temperature;	96%

: C22H25NO5

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With potassium phosphate; tris(2,2-bipyridine)ruthenium(II) hexafluorophosphate; ascorbic acid In water; acetonitrile at 20℃; for 1h; Irradiation;	96%

N-Boc-Ala-PAM resin: N-Boc-Ala-PAM resin

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With trimethyltin(IV) hydroxide In 1,2-dichloro-ethane for 9h; Heating;	94%

: 56-41-7
L-alanin

: tert-butyl (2,4-dioxo-3-azaspiro[5,5]undecan-3-yl) carbonate

: 15761-38-3
L-N-Boc-Ala

Conditions

Conditions	Yield
With sodium carbonate In water; acetonitrile at 25℃; for 10h;	92%

: 2-tert-butoxycarbonylamino-propionic acid 3,3'-bis-benzyloxy-2'-(2-tert-butoxycarbonylamino-propionyloxy)-[1,1']binaphthalenyl-2-yl ester

A: 15761-38-3
L-N-Boc-Ala

: (S)‐3,3′‐bis(benzyloxy)‐[1,1′‐binaphthalene]‐2,2′‐diol

Conditions

Conditions	Yield
With sodium hydroxide In tetrahydrofuran at 60℃; for 11h;	A 79% B 91%

N-(tert-Butoxycarbonyl)-L-alanine Chemical Properties

Molecular Formula: C₈H₁₅NO₄
Formula Weight: 189.21
Melting point:: 79-83 ^°C(lit.)
alpha : -26 ^o(c=2, acetic acid)
refractive index : -25.5 ^° (C=2, AcOH)
storage temp. : -20^°C
Boc-L-Alanine,it is a white to off-white crystalline powder.
STABILITY OF Boc-l-ALANINE: Stable under ordinary conditions. Moisture and light sensitive

N-(tert-Butoxycarbonyl)-L-alanine Uses

Boc-l-ALANINE can be used as an unnatural amino acid for peptidomimetics and biological research.

N-(tert-Butoxycarbonyl)-L-alanine Toxicity Data With Reference

Acute Toxicity
LD₅₀ : No data reported

N-(tert-Butoxycarbonyl)-L-alanine Safety Profile

Hazard Codes :

Xi,Xn
The Risk Statements information of Boc-L-Alanine:
20/21/22: Harmful by inhalation, in contact with skin and if swallowed
36/37/38: Irritating to eyes, respiratory system and skin
The Safety Statements information of Boc-L-Alanine:
26: In case of contact with eyes, rinse immediately with plenty of WATER and seek medical advice
36: Wear suitable protective clothing
24/25: Avoid contact with skin and eyes
WGK Germany : 3

N-(tert-Butoxycarbonyl)-L-alanine Standards and Recommendations

ASSAY OF Boc-l-ALANINE: 98.0% min
OPTICAL ROTATION [a]²⁰: -24^° ~ -26^° (C=2 in Acetic Acid)
SOLUTION CLARITY: clear
Fe: 10ppm max
HEAVY METALS: 10ppm max
As: 2ppm max
LOSS ON DRYING: 0.5% max

N-(tert-Butoxycarbonyl)-L-alanine Specification

Handling: chemicals should be used only by those trained in handling potentially hazardous materials. Rubber gloves, eye protection and protective clothing
should be worn. Operations should be carried out in an efficient fume hood or equivalent system.
Storage: Store in tightly sealed containers in a refrigerator or cold room at 5 degrees centigrade or below. Protect from moisture.

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