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659878

Sigma-Aldrich

叔丁醇钾

sublimed grade, 99.99% trace metals basis

别名:

次丁氧基钾, 第三丁氧基钾

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About This Item

线性分子式:
(CH3)3COK
CAS号:
865-47-4
分子量:
112.21
Beilstein:
3556712
EC 号:
212-740-3
MDL编号:
MFCD00012162
UNSPSC代码:
12352103
PubChem化学物质编号:
24884165
NACRES:
NA.23
价格与库存信息目前不能提供

等级

sublimed grade

蒸汽压

1 mmHg ( 220 °C)

方案

99.99% trace metals basis

表单

solid

反应适用性

core: potassium

mp

256-258 °C (dec.) (lit.)

SMILES字符串

[K+].CC(C)(C)[O-]

InChI

1S/C4H9O.K/c1-4(2,3)5;/h1-3H3;/q-1;+1

InChI key

LPNYRYFBWFDTMA-UHFFFAOYSA-N

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一般描述

叔丁醇钾是一种强醇盐碱，它可以使碳和其他Brφnsted酸去质子化。 它是一种相对较差的亲核试剂。
总杂质：可能含有高达 5000 ppm 的钠

应用

Mizoroki-Heck 型反应由叔丁醇钾介导。叔丁醇钾能引发咔唑基取代环氧乙烷的阴离子聚合。[1]

象形图

FlameCorrosion
GHS02,GHS05

警示用语：

Danger

危险声明

H228,H252,H314

危险分类

Eye Dam. 1 - Flam. Sol. 1 - Self-heat. 2 - Skin Corr. 1A

补充剂危害

EUH014

储存分类代码

4.2 - Pyrophoric and self-heating hazardous materials

WGK

WGK 1

闪点(°F)

Not applicable

闪点(°C)

Not applicable

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
0000414466
0000414465
0000414465
0000414466
0000298413

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Anionic polymerization of carbazolyl-substituted oxiranes initiated by potassium alkalide, potassium tert-butoxide and potassium hydride.
Buika G, et al.
Macromolecular Chemistry and Physics, 196(4), 1287-1293 (1995)
Einav Amit et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 26(57), 13046-13052 (2020-04-29)
N-heterocyclic carbenes (NHCs) have emerged as a unique molecular platform for the formation of self-assembled monolayers (SAMs) on various surfaces. However, active carbene formation requires deprotonation of imidazolium salt precursors, which is mostly facilitated by exposure of the salt to
Eiji Tayama et al.
Organic & biomolecular chemistry, 6(20), 3673-3680 (2008-10-10)
The Stevens rearrangement of N-allylic alpha-aryl amino acid-derived ammonium salts and the Sommelet-Hauser rearrangement of N-benzylic alpha-alkyl amino acid-derived ammonium salts are shown to proceed with remarkably high levels of diastereoselectivity. The methods presented in this work provide new routes
Yong Guo et al.
Organic & biomolecular chemistry, 7(8), 1716-1722 (2009-04-04)
Alpha-fluoro-alpha-aryl-ketones were synthesized by the Pd-catalyzed cross-coupling of aryl bromides with either alpha-fluoroketones or their corresponding silyl enol ethers. The direct arylation with an alpha-fluoroketone requires a strong base, such as potassium tert-butoxide, and under these conditions the presence of
Astrid Beyer et al.
Organic letters, 14(15), 3948-3951 (2012-07-17)
Potassium tert-butoxide-mediated intramolecular α-arylations of fluoro- and chloro-substituted anilides provide oxindoles in DMF at 80 °C. In this manner, diversely substituted products have been obtained in moderate to high yields.
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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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