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ChemicalBook >> CAS DataBase List >>2,2-Dimethyl-1,3-dioxacyclohept-5-ene

2,2-Dimethyl-1,3-dioxacyclohept-5-ene

2,2-Dimethyl-1,3-dioxacyclohept-5-ene Structure
2,2-Dimethyl-1,3-dioxacyclohept-5-ene structure
CAS No.
1003-83-4
Chemical Name:
2,2-Dimethyl-1,3-dioxacyclohept-5-ene
Synonyms
NSC 693424;Gadobutrol Impurity 29;4,7-Dihydro-2,2-diMethyl-1,3-dioxepin;2,2-dimethyl-4,7-dihydro-1,3-dioxepin;2,2-Dimethyl-1,3-dioxacyclohept-5-ene;2,2-DiMethyl-4,7-dihydro-1,3-dioxepine;4,7-Dihydro-2,2-dimethyl-1,3-dioxepine;1,3-Dioxepin, 4,7-dihydro-2,2-dimethyl-;2,2-dimethyl-4,7-dihydro-2H-1,3-dioxepine;2,2-Dimethyl-4,7-dihydro-2H-[1,3]dioxepin
CBNumber:
CB62709255
Molecular Formula:
C7H12O2
Molecular Weight:
128.17
MDL Number:
MFCD22054122
MOL File:
1003-83-4.mol
MSDS File:
SDS
Last updated:2026-05-28 05:39:29
Product description Number Pack Size Price
2,2-Dimethyl-1,3-dioxacyclohept-5-ene >98.0%(GC) D5199 1g $31
2,2-Dimethyl-1,3-dioxacyclohept-5-ene >98.0%(GC) D5199 5g $78
4,7-Dihydro-2,2-dimethyl-1,3-dioxepin 433847 1g $468
4,7-Dihydro-2,2-dimethyl-1,3-dioxepin 433847 2.5g $885
4,7-Dihydro-2,2-dimethyl-1,3-dioxepin TRC-D454180-2.5G 2.5g $440
Request For Quotation

2,2-Dimethyl-1,3-dioxacyclohept-5-ene Properties

Boiling point 147°C(lit.)
refractive index 1.4450 to 1.4490
storage temp. Storage temp. 2-8°C
form Colourless Liquid
color Colorless to Almost colorless
FDA UNII VBZ3ZAK4EJ

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P305+P351+P338
HS Code  2932990090
REACH Registrations Inactive
NFPA 704
0
2 0

2,2-Dimethyl-1,3-dioxacyclohept-5-ene price More Price(26)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
TCI Chemical D5199 2,2-Dimethyl-1,3-dioxacyclohept-5-ene >98.0%(GC) 1003-83-4 1g $31 2026-04-30 Buy
TCI Chemical D5199 2,2-Dimethyl-1,3-dioxacyclohept-5-ene >98.0%(GC) 1003-83-4 5g $78 2026-04-30 Buy
Usbiological 433847 4,7-Dihydro-2,2-dimethyl-1,3-dioxepin 1003-83-4 1g $468 2026-06-03 Buy
Usbiological 433847 4,7-Dihydro-2,2-dimethyl-1,3-dioxepin 1003-83-4 2.5g $885 2026-06-03 Buy
TRC TRC-D454180-2.5G 4,7-Dihydro-2,2-dimethyl-1,3-dioxepin 1003-83-4 2.5g $440 2026-06-03 Buy
Product number Packaging Price Buy
D5199 1g $31 Buy
D5199 5g $78 Buy
433847 1g $468 Buy
433847 2.5g $885 Buy
TRC-D454180-2.5G 2.5g $440 Buy

2,2-Dimethyl-1,3-dioxacyclohept-5-ene Chemical Properties,Uses,Production

Uses

4,7-Dihydro-2,2-dimethyl-1,3-dioxepin is an intermediate in the synthesis of Calcobutrol (C145700), a new macrocyclic polyhydroxylated gadolinium chelate derivative which can be used as a contrast agent for Magnetic Resonance Imaging (MRI).

Synthesis

2-Butene-1,4-diol

6117-80-2

2,2-Dimethoxypropane

77-76-9

2,2-Dimethyl-1,3-dioxacyclohept-5-ene

1003-83-4

GENERAL STEPS: cis-1,2-dihydroxymethylene (9.3 mL, 113 mmol) was dissolved in dichloromethane (DCM) under argon protection, p-toluenesulfonic acid monohydrate (p-TSA-H2O, 1.08 g, 6.2 mmol) was added at room temperature, followed by dropwise addition of 2,2-dimethoxypropane (27.9 mL, 227 mmol). The reaction mixture was stirred at room temperature for 3 hours. Upon completion of the reaction, the reaction was quenched with saturated aqueous sodium bicarbonate (NaHCO3) (50 mL) and extracted with dichloromethane (2 x 50 mL). The organic layers were combined, washed with brine (25 mL) and dried over anhydrous magnesium sulfate (MgSO4). The solvent was slowly evaporated under reduced pressure to afford the colorless oily product 4,7-dihydro-2,2-dimethyl-1,3-dioxepin (10.5 g, 72% yield). The crude product could be used for subsequent reactions without further purification. Thin layer chromatography (TLC) analysis showed an Rf value of 0.51 (ethyl acetate/hexane, 20%). Nuclear magnetic resonance hydrogen spectra (1H NMR, 400 MHz, CDCl3) showed δ 5.66 (2H, triple peak, J = 1.6 Hz, H-1), 4.25 (4H, double peak, J = 1.6 Hz, H-2), and 1.43 (6H, single peak, H-4) ppm. nuclear magnetic resonance carbon spectra (13C NMR, 101 MHz, CDCl3) showed δ 129.5 (2C, C-1), 102.0 (1C, C-3), 61.4 (2C, C-2), 24.0 (2C, C-4) ppm. the obtained data are in agreement with literature reports.

References

[1] Helvetica Chimica Acta, 2000, vol. 83, # 7, p. 1633 - 1644
[2] Tetrahedron Asymmetry, 1995, vol. 6, # 6, p. 1261 - 1272
[3] Patent: US5962704, 1999, A
[4] Patent: US6133461, 2000, A
[5] Beilstein Journal of Organic Chemistry, 2017, vol. 13, p. 2883 - 2887

2,2-Dimethyl-1,3-dioxacyclohept-5-ene Preparation Products And Raw materials

Raw materials

2-BUTENE-1,4-DIOL cis-2-Butene-1,4-diol 2,2-Dimethoxypropane Dichloromethane p-Toluenesulfonic acid monohydrate

Preparation Products

4,4-Dimethyl-3,5,8-trioxabic-yclo[5,1,0]Octane

2,2-Dimethyl-1,3-dioxacyclohept-5-ene Suppliers

Global( 78)Suppliers
Supplier Tel Email Country ProdList Advantage
career henan chemical co 		+86-0371-86658258 factory@coreychem.com China 29780 58
Dideu Industries Group Limited 		+8617392712697 1022@dideu.com China 29096 58
Protheragen-ING 		+86-15618352007 info@protheragen-ing.com United States 3867 58
HANGZHOU LEAP CHEM CO., LTD. 		+86-571-87711850 +86-15355479329 market18@leapchem.com China 43303 58
Aladdin Scientific 		tp@aladdinsci.com United States 54746 58
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD 		+86-15225627621 +86-13213167925 jiuyitime@fdachem.com China 16505 58
NANJING YINGWEN BIOTECHNOLOGY CO LTD 		+86-13382787392 sales@aeechem.com China 10000 58
Amadis Chemical Company Limited 		571-89925085 sales@amadischem.com China 131885 58
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Supplier Advantage
career henan chemical co 		58
Dideu Industries Group Limited 		58
Protheragen-ING 		58
HANGZHOU LEAP CHEM CO., LTD. 		58
Aladdin Scientific 		58
ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD 		58
NANJING YINGWEN BIOTECHNOLOGY CO LTD 		58
Amadis Chemical Company Limited 		58
J & K SCIENTIFIC LTD. 76
TCI (Shanghai) Development Co., Ltd. 81

View Lastest Price from 2,2-Dimethyl-1,3-dioxacyclohept-5-ene manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,2-Dimethyl-4,7-dihydro-2H-[1,3]dioxepin pictures 2022-01-15 2,2-Dimethyl-4,7-dihydro-2H-[1,3]dioxepin
1003-83-4
 1KG 98.2% 100 tons Honest Joy Holdings Limited
4,7-Dihydro-2,2-diMethyl-1,3-dioxepin pictures 2019-12-25 4,7-Dihydro-2,2-diMethyl-1,3-dioxepin
1003-83-4
 1KG 95%-99% 1kg; 100kg； 500kg Career Henan Chemical Co

2,2-Dimethyl-1,3-dioxacyclohept-5-ene Spectrum

2,2-Dimethyl-1,3-dioxacyclohept-5-ene(1003-83-4)1HNMR

1003-83-4(2,2-Dimethyl-1,3-dioxacyclohept-5-ene)Related Search:

GADOTERIDOL RELATED COMPOUND C (50 MG) (1,4,7,10-TETRAAZA-11-OXO-BICYCLO[8.2.2]TETRADE-CANE-4,7-DIACETIC ACID) 1,4,7,10-Tetraazabicyclo[8.2.2]tetradecan-11-one INDEX NAME NOT YET ASSIGNED n-Propyl Dioxepin 7,12-Dioxa-spiro[5.6]dodec-9-ene
1,3-DIOXEP-5-ENE

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4,7-Dihydro-2,2-diMethyl-1,3-dioxepin 2,2-DiMethyl-4,7-dihydro-1,3-dioxepine 2,2-Dimethyl-1,3-dioxacyclohept-5-ene 2,2-Dimethyl-4,7-dihydro-2H-[1,3]dioxepin NSC 693424 2,2-dimethyl-4,7-dihydro-2H-1,3-dioxepine Gadobutrol Impurity 29 1,3-Dioxepin, 4,7-dihydro-2,2-dimethyl- 4,7-Dihydro-2,2-dimethyl-1,3-dioxepine 2,2-Dimethyl-1,3-dioxacyclohept-5-ene ISO 9001：2015 REACH 2,2-dimethyl-4,7-dihydro-1,3-dioxepin 1003-83-4