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Ethyl carbazate, 97%, Thermo Scientific Chemicals
Prepare 4-phenylurazole from ethyl carbazate and then oxidize the urazole with gaseous dinitrogen tetroxide to yield 4-phenyl-1,2,4-tri- azoline-3,5-dione la. Modification of the ethyl carbazate procedure in which analytically pure monoalkylhydrazine hydrochlorides were isolated in greater than 90% yield, starting from a ketone or aldehyde. Treatment of primary amines is with chloroamine or hydroxylamine-0-sulfonic acid and the condensation of a carbonyl compound with ethyl carbazate. The FeCl 3 -catalyzed reaction of ethyl carbazate (2 b) proceeded readily to give β-hydroxyester 3 b in better yield. A new one-pot neat synthesis of some 5-aryl-2,4-dihydro-3H-1,2,4-triazol-3-ones through cyclocondensation of ethyl carbazate with aryl nitriles catalyzed by DMAP as an efficient and basic nucleophilic catalyst is described.
This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.
Prepare 4-phenylurazole from ethyl carbazate and then oxidize the urazole with gaseous dinitrogen tetroxide to yield 4-phenyl-1,2,4-tri- azoline-3,5-dione la. Modification of the ethyl carbazate procedure in which analytically pure monoalkylhydrazine hydrochlorides were isolated in greater than 90% yield, starting from a ketone or aldehyde. Treatment of primary amines is with chloroamine or hydroxylamine-0-sulfonic acid and the condensation of a carbonyl compound with ethyl carbazate. The FeCl 3 -catalyzed reaction of ethyl carbazate (2 b) proceeded readily to give β-hydroxyester 3 b in better yield. A new one-pot neat synthesis of some 5-aryl-2,4-dihydro-3H-1,2,4-triazol-3-ones through cyclocondensation of ethyl carbazate with aryl nitriles catalyzed by DMAP as an efficient and basic nucleophilic catalyst is described.
Solubility
Very soluble in water.
Notes
Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Store away from strong oxidizing agents.
Specifications
Melting Point
44°C to 47°C
Boiling Point
85°C to 86°C (7 mmHg)
Flash Point
86°C (186°F)
Quantity
250 g
UN Number
UN2811
Beilstein
878265
Sensitivity
Moisture sensitive
Solubility Information
Very soluble in water.
Formula Weight
104.11
Percent Purity
97%
Hazard Category
H301+H311-H315-H319-H335-H373
Hazard Statement
GHS H Statement
H300-H315-H319-H335
Fatal if swallowed.
Causes skin irritation.
Causes serious eye irritation.
May cause respiratory irritation.
Precautionary Statement
P260-P264b-P270-P271-P280-P301+P310-P302+P352-P304+P340-P305+P351+P338-P312-P314-P330-P332+P313-P361-P363-P501c
DOTInformation
Transport Hazard Class: 6.1; Packing Group: III; Proper Shipping Name: TOXIC SOLIDS, ORGANIC, N.O.S.
EINECSNumber
223-903-3
RTECSNumber
FE2545000
TSCA
Yes
Recommended Storage
Ambient temperatures
RUO – Research Use Only
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