Isobutyric anhydride, Chinese alias 2-methylpropionic anhydride, molecular formula C8H14O3, molecular weight 158.195. national standard number: 33593. it is used as an intermediate for the synthesis of pesticides and drugs, and for the preparation of isobutyric acid ester plasticizers and flavors / fragrances< Br>
- Código HS:2915900090
- Datos Aduaneros:
China Customs Code:
2915900090
Overview:
2915900090. Other saturated acyclic monocarboxylic acids and their anhydrides(Acyl halide\Peroxygenation)Chemicals\Peroxy acid and its halogenation\nitrification\sulfonation\Nitrosative derivative. VAT:17.0%. Tax refund rate:9.0%. Regulatory conditions:AB(Customs clearance form for Inbound Goods,Customs clearance form for outbound goods). MFN tariff:5.5%. general tariff:30.0%
Declaration elements:
Product Name, component content, use to
Regulatory conditions:
A.Customs clearance form for Inbound Goods
B.Customs clearance form for outbound goods
Inspection and quarantine category:
R.Sanitary supervision and inspection of imported food
S.Sanitary supervision and inspection of exported food
M.Import commodity inspection
N.Export commodity inspection
Summary:
2915900090 other saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:5.5% General tariff:30.0%
Circuitos sintéticos 1
Referencia
Product class 4: carboxylic acid anhydrides and their sulfur, selenium, and tellurium derivatives
Keller, P. A.,
Science of Synthesis,
2006,
,
617-641
Circuitos sintéticos 2
1.1
Reagents:
Methyl oleate
,
Oxygen
Catalysts:
Cobalt oxide
Solvents:
Acetonitrile
;
6 h, 1 atm, 25 °C
Referencia
Highly efficient and robust aerobic co-oxidation of olefins and aldehydes over CoOx dispersed within hierarchical silicalite-1 zeolites
Li, Chenhao; et al,
Green Chemistry,
2022,
24(16),
6200-6214
Circuitos sintéticos 3
1.1
Reagents:
Thionyl chloride
,
Pyridine, 4-ethenyl-, polymer with diethenylbenzene and 1-ethenyl-4-ethylbenzene
Solvents:
Dichloromethane
1.1
Reagents:
Di-tert-butyl dicarbonate
Catalysts:
Magnesium chloride
Solvents:
Tetrahydrofuran
;
6 h, rt
1.1
Reagents:
Phosphorus pentoxide
,
Sulfuric acid
;
0.5 h, 20 °C; 3 h, 100 °C
Referencia
Phase-managed organic synthesis. 3. Symmetrical anhydrides from carboxylic acids via polymer-assisted reactionReaction of dicarbonates with carboxylic acids catalyzed by weak lewis acids: general method for the synthesis of anhydrides and estersMethod for preparing low carbon chain symmetric anhydride
Fife, Wilmer K.; et al
Bartoli, Giuseppe; et al,
Tetrahedron Letters,
1986,
27(41),
4937-40
Circuitos sintéticos 4
1.1
350 °C → 500 °C; 0.01 - 1 s, 60 - 120 torr, 400 - 500 °C
2.1
-
Referencia
Method and device for preparation of compounds using isobutyric acid and acetic anhydride
,
China,
,
,
Circuitos sintéticos 5
1.1
Reagents:
Divinylbenzene-4-vinylpyridine copolymer
Solvents:
Dichloromethane
Referencia
Phase-managed organic synthesis. 2. A new polymer-assisted synthesis of acid anhydrides
Fife, Wilmer K.; et al,
Tetrahedron Letters,
1986,
27(41),
4933-6
Circuitos sintéticos 6
1.1
Catalysts:
(T-4)-Dichlorobis(triphenylphosphine)cobalt
Solvents:
Dichloromethane
1.1
Catalysts:
(T-4)-Dichlorobis(triphenylphosphine)cobalt
(polymer-supported)
Solvents:
Dichloromethane
Referencia
Preparation of a Resin-Bound Cobalt Phosphine Complex and Assessment of Its Use in Catalytic Oxidation and Acid Anhydride SynthesisPreparation of a Resin-Bound Cobalt Phosphine Complex and Assessment of Its Use in Catalytic Oxidation and Acid Anhydride Synthesis
Leadbeater, Nicholas E.; et al
Leadbeater, Nicholas E.; et al,
Journal of Organic Chemistry,
2000,
65(15),
4770-4772
Circuitos sintéticos 7
1.1
Reagents:
Trichloroisocyanuric acid
Solvents:
Dichloromethane
;
1 - 2 min, rt; rt → 0 °C
1.2
Reagents:
Triethylamine
,
Water
;
rt
Referencia
Metal-free oxidative self-coupling of aldehydes or alcohols to symmetric carboxylic anhydrides
Gaspa, Silvia; et al,
Tetrahedron Letters,
2017,
58(26),
2533-2536
Circuitos sintéticos 8
Referencia
Chemical apparatus and method for preparing isobutyric anhydridePreparation of cyclic nucleotides as STING agonistsPreparation method of 2,2,4,4-tetramethyl-1,3-cyclobutanediol
,
China,
,
,
Circuitos sintéticos 9
1.1
Reagents:
Sulfuric acid
Catalysts:
Naphtha (petroleum), hydrotreated heavy
Solvents:
Water
;
5 °C → 27 °C
2.1
Reagents:
Acetic anhydride
;
< 400 mbar, 120 °C
Referencia
Process for the production of diacyl peroxides
,
World Intellectual Property Organization,
,
,
Circuitos sintéticos 10
1.1
Reagents:
Triethylamine
,
Cerium trichloride
Solvents:
Acetonitrile
;
2 h, 40 °C
Referencia
Response surface methodology based on the Box-Behnken design for optimizing the synthesis of symmetrical anhydrides from acid chlorides using cerium (III) as a homogeneous catalyst
Larba, Seif Eddine; et al,
ChemistrySelect,
2023,
8(28),
Circuitos sintéticos 11
1.1
Catalysts:
Trichloroisocyanuric acid
Solvents:
Dichloromethane
;
1 - 2 min, rt; rt → 0 °C
1.2
0 °C
1.3
Reagents:
Triethylamine
;
0 °C; rt
Referencia
Anhydrides from aldehydes or alcohols via oxidative cross-coupling
Gaspa, Silvia; et al,
New Journal of Chemistry,
2017,
41(3),
931-939
Circuitos sintéticos 12
1.1
Reagents:
Triethylamine
Solvents:
Chloroform
Referencia
Influence of aliphatic amide terminals on the thermoresponsive properties of hyperbranched polyethylenimines
Qin, Hong-wei; et al,
Chinese Journal of Polymer Science,
2014,
32(10),
1338-1347
Circuitos sintéticos 13
1.1
Reagents:
Sulfuric acid
;
pH 2.5, 40 °C
2.1
Reagents:
Acetic anhydride
;
< 400 mbar, rt → 120 °C
Referencia
Process for the production of peroxyesters
,
World Intellectual Property Organization,
,
,
Circuitos sintéticos 14
1.1
Reagents:
Hydrogen
Catalysts:
Palladium
;
4 h, 20 bar, 70 °C
2.1
Catalysts:
Silica
;
500 °C
Referencia
Preparation method of 2,2,4,4-tetramethyl-1,3-cyclobutanediol
,
Korea,
,
,
Circuitos sintéticos 15
1.1
Reagents:
Potassium carbonate
Catalysts:
Bromo[1,1′-thiobis[methane]]copper
Solvents:
Acetonitrile
;
5 min, rt
1.2
Solvents:
Acetonitrile
;
9 - 12 min, 6 atm, 43 °C; 8 h, 43 °C
Referencia
Light-Mediated Synthesis of Aliphatic Anhydrides by Cu-Catalyzed Carbonylation of Alkyl Halides
Tung, Pinku; et al,
Journal of the American Chemical Society,
2023,
145(17),
9423-9427
Circuitos sintéticos 16
Referencia
Product class 4: carboxylic acid anhydrides and their sulfur, selenium, and tellurium derivatives
Keller, P. A.,
Science of Synthesis,
2006,
,
617-641
Circuitos sintéticos 17
1.1
Reagents:
Sulfuric acid
;
pH 2.5, 40 °C
2.1
Reagents:
Acetic anhydride
;
< 400 mbar, rt → 120 °C
Referencia
Process for the production of peroxyesters
,
World Intellectual Property Organization,
,
,
Circuitos sintéticos 18
1.1
300 mm Hg → 80 mm Hg, 115 - 120 °C
Referencia
Method and device for preparation of compounds using isobutyric acid and acetic anhydrideDehydration process for making isobutyric anhydride from isobutyric acid and acetic anhydride
,
China,
,
,
Circuitos sintéticos 19
1.1
Reagents:
Isobutyraldehyde
,
Oxygen
Catalysts:
1H-Imidazole, cobalt(2+) salt (2:1)
Solvents:
Acetonitrile
;
5 h, 308 K
Referencia
Epoxidation of olefins with O2 and isobutyraldehyde catalyzed by cobalt (II)-containing zeolitic imidazolate framework material
Zhang, Aiping; et al,
Catalysis Communications,
2011,
12(13),
1183-1187
Circuitos sintéticos 20
Referencia
Dehydration induced by intramolecular redox character of a stable allylidenetributylphosphorane
Kawamura, Yasuhiko; et al,
Tetrahedron Letters,
1997,
38(45),
7893-7896