(E)-Ethyl 4-(diethoxyphosphoryl)but-2-enoate

CAS 42516-28-9 C₁₀H₁₉O₅P 250.23 g/mol Catalogue item Acids, Esters & Lactones

Structure of (E)-Ethyl 4-(diethoxyphosphoryl)but-2-enoate, CAS 42516-28-9 — Structure · C10H19O5P

CAS number: 42516-28-9
Molecular formula: C₁₀H₁₉O₅P
Molecular weight: 250.23 g/mol
Standard packing: 1kg / 25kg / 100kg

CAS 42516-28-9, (E)-Ethyl 4-(diethoxyphosphoryl)but-2-enoate, is a C10H19O5P ester – the protected form of the corresponding acid.

Methyl and ethyl esters of this size also serve as enolate equivalents in Claisen and alkylation chemistry, where the ester stabilises the carbanion. Because the configuration is specified, the useful comparison is with the other isomer of the same skeleton rather than with another chain length. The acetal is a masked carbonyl. It survives base and hydride conditions and is opened under acid, which is what makes it useful in the middle of a sequence.

The formula C10H19O5P resolves to 10 carbons with 5 oxygens and one phosphorus. At 10 carbons the entry is an oil or a low-melting solid, and it is handled at ambient temperature in most steps.

Handling and storage

Store neutral, dry and closed. The free acid that appears on hydrolysis is the impurity to check on a lot that has been open for months.

Ordering

Standard packing 1kg / 25kg / 100kg. Other unit weights are quoted per lot and confirmed in writing before the material is packed. Release testing covers identity and assay; the impurity profile is available on request rather than being printed on this page.

Other acids, esters & lactones entries

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CAS	Compound	Formula	MW	Packing	Quote
14113-05-4	10-Hydroxy-2-decenoic acid	C₁₀H₁₈O₃	186.25	1kg / 25kg / 100kg	Request
83905-98-0	11-Hydroxyundecylphosphonic acid	C₁₁H₂₅O₄P	252.29	1kg / 25kg / 100kg	Request
109-29-5	16-Hexadecanolide	C₁₆H₃₀O₂	254.41	1kg / 25kg / 100kg	Request
506-13-8	16-Hydroxyhexadecanoic acid	C₁₆H₃₂O₃	272.42	1kg / 25kg / 100kg	Request
10154-71-9	3-(Phenylsulfonyl)propionic acid	C₉H₁₀O₄S	214.24	1kg / 25kg / 100kg	Request
1577-22-6	5-Hexenoic acid	C₆H₁₀O₂	114.14	1kg / 25kg / 100kg	Request
59320-77-3	8-Methylnon-6-enoic acid	C₁₀H₁₈O₂	170.25	1kg / 25kg / 100kg	Request
28645-51-4	Ambrettolide	C₁₆H₂₈O₂	252.39	1kg / 25kg / 100kg	Request

Specification

CAS	42516-28-9
Formula	C₁₀H₁₉O₅P
Molecular weight	250.23 g/mol
Packing	1kg / 25kg / 100kg
Assay	lot specific, on COA
Appearance	see COA
Storage	cool, dry, inert

Ordering

Catalogue items ship from stock or are made to order, whichever the lot status requires. A gram-scale sample is available before a kilo lot is committed.

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Supplied for laboratory and industrial use. Not for drug, cosmetic or household use.

Quotation

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Entry	(E)-Ethyl 4-(diethoxyphosphoryl)but-2-enoate
CAS	42516-28-9
Typical lead time	Stock or 2–4 weeks
Documentation	COA, SDS, spec sheet

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(E)-Ethyl 4-(diethoxyphosphoryl)but-2-enoate (42516-28-9)

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