2-триметилсилил-1 ,3-дитиан
- английское имя2-TRIMETHYLSILYL-1,3-DITHIANE
- CAS №13411-42-2
- CBNumberCB2671400
- ФормулаC7H16S2Si
- мольный вес192.42
- EINECS236-504-4
- номер MDLMFCD00006655
- файл Mol13411-42-2.mol
химическое свойство
Температура кипения | 54-55 °C0.17 mm Hg(lit.) |
плотность | 1.014 g/mL at 25 °C(lit.) |
показатель преломления | n |
Fp | 205 °F |
температура хранения | 2-8°C |
растворимость | Insol H2O; sol organic solvents. |
форма | clear liquid |
цвет | Colorless to Light yellow to Light orange |
Удельный вес | 1.014 |
Гидролитическая чувствительность | 4: no reaction with water under neutral conditions |
БРН | 1616463 |
Справочник по базе данных CAS | 13411-42-2(CAS DataBase Reference) |
Заявления о безопасности | 23-24/25 | |||||||||
РИДАДР | 3334 | |||||||||
WGK Германия | 3 | |||||||||
F | 13 | |||||||||
TSCA | No | |||||||||
кода HS | 2934.99.9001 | |||||||||
NFPA 704: |
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2-триметилсилил-1 ,3-дитиан химические свойства, назначение, производство
Химические свойства
CLEAR COLORLESS TO SLIGHTLY YELLOW LIQUIDФизические свойства
bp 54–55 °C/0.17 mmHg.Использование
2-Trimethylsilyl-1,3-dithiane is the precursor of dithioketene acetals which are good substrates for both cationic and anionic cyclization processes; the anion reacts with unsaturated ketones and aldehydes to give vinyl dithioketene acetals that can be used as dienes or for the preparation of substituted α,β-unsaturated alkyl ketones; alkylation of the anion provides a general synthesis of acylsilanes. It participates the following reactions: Thioketene Acetals, Cationic and Anionic Cyclizations, Unsaturated Dithioketene Acetals, Acylsilanes, Multicomponent Linchpin Reactions, Formation of Bis(acylsilanes) etc.Подготовка
2-Trimethylsilyl-1,3-dithiane is prepared by alkylation of 2-lithio-1,3- dithiane with chlorotrimethylsilane (eq 1).Общее описание
2-(Trimethylsilyl)-1,3-dithiane participates in Lewis base-catalyzed 1,3-dithiane addition to electrophiles such as carbonyl compounds and N-substituted aldimines. It undergoes novel diazo transfer reaction with tosyl azide in hexamethylphosphoramide-THF to yield 2-diazo-1,3-dithiane, which on decomposition yields formal carbene adducts. It is a versatile acyl anion equivalent.Методы очистки
Fractionally distil the dithiane through an efficient column and collect the fractions that have the correct NMR and IR spectra. 1H NMR (CCl4) 6.36 (SiMe3), 9.87 (SCHS) and dithiane H at 7 and 8 (ratio 1:9:4:2) from Me4Si; UV 244nm ( 711), sh 227nm ( 800). [Corey et al. J Am Chem Soc 89 max 434 1967.]2-триметилсилил-1 ,3-дитиан запасные части и сырье
запасной предмет
2-триметилсилил-1 ,3-дитиан поставщик
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