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99391-20-5

The chemical "u,u-4a,5,6,7,8,8a-hexahydro-4-(4-methoxyphenyl)-8a-<(trimethylsilyl)oxy>-4H-1,2-benzoxazine-2-oxide" is a complex organic compound with a molecular formula of C18H25NO3Si. It is a derivative of benzoxazine, which is a heterocyclic compound consisting of a benzene ring fused to an oxazine ring. The compound features a hexahydro structure, indicating the presence of six hydrogen atoms in a cyclic structure. It has a 4-methoxyphenyl group attached to the benzene ring, which contributes to its aromatic character and potential reactivity. The 8a-position is substituted with a trimethylsilyl group, which is a common protecting group in organic synthesis, and an oxygen atom, indicating the presence of an ether linkage. The compound is an oxide, suggesting it contains an oxygen atom that is not part of a carbon-oxygen double bond. u,u-4a,5,6,7,8,8a-hexahydro-4-(4-methoxyphenyl)-8a-<(trimethylsilyl)oxy>-4H-1,2-benzoxazine-2-oxide is likely to be used in advanced organic synthesis, particularly in the preparation of pharmaceuticals or other specialty chemicals, due to its unique structure and reactivity.

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  • u,u-4a,5,6,7,8,8a-hexahydro-4-(4-methoxyphenyl)-8a-<(trimethylsilyl)oxy>-4H-1,2-benzoxazine-2-oxide

    Cas No: 99391-20-5

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  • 99391-20-5 Structure

  • Basic information

    1. Product Name: u,u-4a,5,6,7,8,8a-hexahydro-4-(4-methoxyphenyl)-8a-<(trimethylsilyl)oxy>-4H-1,2-benzoxazine-2-oxide
    2. Synonyms:
    3. CAS NO:99391-20-5
    4. Molecular Formula:
    5. Molecular Weight: 349.502
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 99391-20-5.mol

  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: N/A
    3. Flash Point: N/A
    4. Appearance: N/A
    5. Density: N/A
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: u,u-4a,5,6,7,8,8a-hexahydro-4-(4-methoxyphenyl)-8a-<(trimethylsilyl)oxy>-4H-1,2-benzoxazine-2-oxide(CAS DataBase Reference)
    10. NIST Chemistry Reference: u,u-4a,5,6,7,8,8a-hexahydro-4-(4-methoxyphenyl)-8a-<(trimethylsilyl)oxy>-4H-1,2-benzoxazine-2-oxide(99391-20-5)
    11. EPA Substance Registry System: u,u-4a,5,6,7,8,8a-hexahydro-4-(4-methoxyphenyl)-8a-<(trimethylsilyl)oxy>-4H-1,2-benzoxazine-2-oxide(99391-20-5)

  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 99391-20-5(Hazardous Substances Data)

99391-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99391-20-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,3,9 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99391-20:
(7*9)+(6*9)+(5*3)+(4*9)+(3*1)+(2*2)+(1*0)=175
175 % 10 = 5
So 99391-20-5 is a valid CAS Registry Number.

99391-20-5Relevant articles and documents

Cyclic nitronates from the diastereoselective addition of 1-trimethylsilyloxycyclohexene to nitroolefins. Starting materials for stereoselective Henry reactions and 1,3-dipolar cycloadditions

Brook, Michael A.,Seebach, Dieter

, p. 836 - 850 (2007/10/02)

Induced by a stoichiometric excess of dichloro(diisopropoxy)-titanium, 1-trimethylsilyloxycyclohexene and (E)-nitroolefins (R-CH=CHNO2, R = C6H5, p-C6H4CH3, p-C6H4OCH3, p-C6H4CN, CH3) combine in CH2Cl2 solution at -90 deg C preferentially with relative topicity ul, opposite to the corresponding reaction of enolates or enamines.The primary products are the epimeric bicyclic nitronates 4-6, which can be separated, and which are converted by KF in MeOH to the alkyl or aryl (nitroethyl)-substituted cyclohexanones 1 and 2 (Table 1).Instead of being solvolysed, the cyclic nitronates 4-6 can be used for nitroaldol additions to give the trisubstituted hexahydrobenzopyranols 15-19.Alternatively, 4-6 can be used in 1,3-dipolar cycloadditions with acrylates to furnish the tricyclic compounds 22-31.In either case, products with four asymmetric carbon atoms (not including acetal centres) are produced diastereoselectively.The addition described here is yet another example of an ul combination of trigonal centres induced by Lewis acids, overriding the influence of the configuration of the donor component.

Reversed Stereochemical Course of the Michael Addition of Cyclohexanone to β-nitrostyrenes by Using 1-(Trimethylsiloxy)cyclohexene/Dichloro(diisopropoxy)titanium

Seebach, Dieter,Brook, Michael A.

, p. 319 - 324 (2007/10/02)

Induced by a stoichiometric excess of dichloro(diisopropoxy)titanium, 1-(trimethylsiloxy)cyclohexene and p-substituted β-nitrostyrenes (Y=H, CH3, CH3O, CN) combine in CH2Cl2 solution at -90 deg preferentially with relative topicity ul - opposite to the co

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