ChemicalBook CAS DataBase List 2,3-Dimethylpyrazine

2,3-Dimethylpyrazine synthesis

11synthesis methods

Product Name:2,3-Dimethylpyrazine
CAS Number:5910-89-4
Molecular formula:C6H8N2
Molecular Weight:108.14

107-15-3
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56-81-5 Synthesis

56-81-5
1874 suppliers
$5.00/25g

290-37-9 Synthesis

290-37-9
339 suppliers
$5.00/5g

109-08-0
453 suppliers
$6.00/10g

123-32-0 Synthesis

123-32-0
538 suppliers
$6.00/5g

5910-89-4
403 suppliers
$5.00/5g

6705-33-5
135 suppliers
$14.14/250mgs:

108-50-9
405 suppliers
$10.00/10g

5780-66-5 Synthesis

5780-66-5
177 suppliers
$17.00/100mg

Yield:-

Reaction Conditions:

in water at 375; under 760.051 Torr; for 6 h;Inert atmosphere;Flow reactor;

Steps:

2.3. Activity Measurements
The dehydrocyclization activities of Zn-Cr-Ocatalysts calcined at different temperatures were performedat 375°C and atmospheric pressure in a fixedbedvertical quartz reactor (i.d = 8 mm, length =450 mm) placed in a two zone furnace operated in adown flow mode. In the first zone maintained at300°C the reaction mixture was preheated whereas inthe second zone containing the catalyst bed the reactortemperature was set at 375°C. Temperatures in theboth zones were monitored by a temperature controller-cum-programmer using a K-type thermocouple.Glycerol (Fluka) and EDA (SDFCL, India) wereused. Nitrogen (IOLAR-I grade, BOC, India) wasused as a carrier gas. The catalytic activities were measured using -18/+23 sieved (BSS) particles. The carbonmass balance was done based on the inlet and outletconcentration of the organic moiety. Prior to thereaction, the calcined catalyst (about 0.2 g) wasreduced in a flow of 5% H2 and 95% Ar (30 mL min-1)at 400°C for 5 h. The catalytic activities were measuredunder strict kinetic control. An aqueous glycerol solution(20 wt% in H2O) was used with a glycerol to EDAmole ratio of 1 :1 , at a flow rate of 5 mL h-1 (10 mmolglycerol + 10 mmol EDA + 200 mmol H2O), alongwith N2 as a carrier gas at a flow rate of 1800 mL h-1.The feed mixture mole ratio is glycerol : EDA : H2O :N2= 1 : 1 : 20 : 8. The product mixture was analyzed bygas chromatograph (Shimadzu, GC-17A) via a flameionization detector (FID) using a ZB-5 capillary columnat a ramping rate of 10°C min-1 from 60 to280°C. The mass balance for all the measurements was>95%. The samples were analyzed by GC-MS(QP5050A Shimadzu) using a ZB-5 capillary columnwith EI mode.

References:

Sarkari, Reema;Krishna, Vankudoth;Sudhakar, Medak;Rao, Tumula Venkateshwar;Padmasri, Aytam Hari;Srinivas, Darbha;Venugopal, Akula [Kinetics and Catalysis,2016,vol. 57,# 5,p. 602 - 609][Kinet. Katal.,2016,vol. 57,# 5,p. 607 - 614,8]

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107-15-3
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431-03-8 Synthesis