Schollkopf reagent

Modify Date: 2025-08-21 11:07:12

Schollkopf reagent Structure
Schollkopf reagent structure
 Common Name Schollkopf reagent
CAS Number 78342-42-4 Molecular Weight 184.236
Density 1.1±0.1 g/cm3 Boiling Point 245.2±33.0 °C at 760 mmHg
Molecular Formula C9H16N2O2 Melting Point N/A
MSDS Chinese USA Flash Point 85.6±17.9 °C

 Names

Name (2S)-(+)-2,5-Dihydro-3,6-dimethoxy-2-isopropylpyrazine
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.1±0.1 g/cm3
Boiling Point 245.2±33.0 °C at 760 mmHg
Molecular Formula C9H16N2O2
Molecular Weight 184.236
Flash Point 85.6±17.9 °C
Exact Mass 184.121185
PSA 43.18000
LogP -0.40
Vapour Pressure 0.0±0.5 mmHg at 25°C
Index of Refraction 1.503

 Safety Information

Personal Protective Equipment Eyeshields;Gloves
Hazard Codes Xn: Harmful;
Risk Phrases R22
Safety Phrases S23-S24/25-S37/39-S26
RIDADR NONH for all modes of transport
WGK Germany 3
HS Code 2933990090

 Synthetic Route

Trimethyloxonium tetrafluoroborate structure

Trimethyloxoniu...

CAS#:420-37-1

(S)-3-Isopropyl-2,5-Piperazinedione structure

(S)-3-Isopropyl...

CAS#:16944-60-8

~80%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Schoellkopf, Ulrich; Groth, Ulrich; Deng, Chuanzheng Angewandte Chemie, 1981 , vol. 93, # 9 p. 793 - 795
L-Valine structure

L-Valine

CAS#:72-18-4

~%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Tetrahedron Asymmetry, , vol. 9, # 2 p. 321 - 327
Boc-L-Valine structure

Boc-L-Valine

CAS#:13734-41-3

~%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Organic Process Research and Development, , vol. 9, # 2 p. 185 - 187
Boc-Val-O-COO-isoBu structure

Boc-Val-O-COO-isoBu

CAS#:66866-46-4

~%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Organic Process Research and Development, , vol. 9, # 2 p. 185 - 187
For-Val-OH structure

For-Val-OH

CAS#:4289-97-8

~%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Angewandte Chemie, , vol. 93, # 9 p. 793 - 795
N-L-valyl-glycine methyl ester structure

N-L-valyl-glyci...

CAS#:53932-18-6

~%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Tetrahedron Asymmetry, , vol. 9, # 2 p. 321 - 327
ethyl L-valylglycinate structure

ethyl L-valylgl...

CAS#:60654-81-1

~%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Angewandte Chemie, , vol. 93, # 9 p. 793 - 795
(4S)-4-Isopropyl-1,3-oxazolidine-2,5-dione structure

(4S)-4-Isopropy...

CAS#:24601-74-9

~%

Schollkopf reagent Structure

Schollkopf reagent

CAS#:78342-42-4

Literature: Tetrahedron Asymmetry, , vol. 9, # 2 p. 321 - 327

 Customs

HS Code 2933990090
Summary 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

 Synonyms

(2R)-2-Isopropyl-3,6-dimethoxy-2,5-dihydropyrazine
(R)-Schollkopf Reagent
(2S)-2-Isopropyl-3,6-dimethoxy-2,5-dihydropyrazine
(2S)-3,6-dimethoxy-2-(propan-2-yl)-2,5-dihydropyrazine
Schollkopf reagent
Pyrazine, 2,5-dihydro-3,6-dimethoxy-2-(1-methylethyl)-, (2S)-
(R)-(-)-2-Isopropyl-3,6-dimethoxy-2,5-dihydropyrazine
Pyrazine, 2,5-dihydro-3,6-dimethoxy-2-(1-methylethyl)-, (2R)-
(2S)-3,6-dimethoxy-2-propan-2-yl-2,5-dihydropyrazine
(2R)-3,6-dimethoxy-2-(propan-2-yl)-2,5-dihydropyrazine
(R)-2,5-Dihydro-3,6-dimethoxy-2-isopropylpyrazine
MFCD00066229
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2-(4-methoxyphenoxy)-N-(3-methyl-1-(4-oxo-1-phenyl-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl)-1H-pyrazol-5-yl)acetamide
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