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13161-32-5

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13161-32-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13161-32-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,1,6 and 1 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 13161-32:
(7*1)+(6*3)+(5*1)+(4*6)+(3*1)+(2*3)+(1*2)=65
65 % 10 = 5
So 13161-32-5 is a valid CAS Registry Number.

13161-32-5SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 14, 2017

Revision Date: Aug 14, 2017

1.Identification

1.1 GHS Product identifier

Product name 4-hydroxy-3H-2-benzofuran-1-one

1.2 Other means of identification

Product number -
Other names 4-hydroxyphtalide

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:13161-32-5 SDS

13161-32-5Relevant articles and documents

A Biomimetic Synthesis of des -Hydroxy Paecilospirone

Feng, Zhen-Gao,Burnett, G. Leslie,Pettus, Thomas R. R.

supporting information, p. 1517 - 1519 (2018/05/16)

The carbon framework of des -hydroxy paecilospirone was rapidly synthesized using a biomimetic approach whereby an enol ether and an ortho -quinone methide (o- QM), each derived from the same lactone, were combined to arrive at the complete carbon skeleton of paecilospirone.

Total synthesis of neo-tanshinlactones through a cascade benzannulation-lactonization as the key step

Ghosh, Ketaki,Karmakar, Raju,Mal, Dipakranjan

, p. 4037 - 4046 (2013/07/19)

The cascade annulation-lactonization of phthalides with α-carboxyfurylacrylates in the presence of lithium hexamethyldisilazide (LiHMDS) provides both convergent and semiconvergent regioselective syntheses of neo-tanshinlactones in moderate yields. This methodology also offers an avenue for the direct syntheses of hitherto unreported 6-alkoxycarbonyl-substituted neo-tanshinlactones and their heterocyclic analogues. A new synthesis of 4-alkyl phthalides was developed on the basis of a combination of a Duff reaction and Fuerstner cross-coupling. The cascade benzannulation-lactonization of phthalides with α-carboxyfurylacrylates was employed as the key reaction for the concise synthesis of neo-tanshinlactone. Copyright

Regiocontrolled rearrangement of isobenzofurans

Egan, Ben A.,Paradowski, Michael,Thomas, Lynne H.,Marquez, Rodolfo

supporting information; experimental part, p. 2086 - 2089 (2011/06/25)

Regioselective alkylation and oxidative rearrangement of isobenzofurans has been achieved to generate substituted 4,8- ihydroxyisochromanones in good yields and with complete regiocontrol.

7-Hydroxyphthalide: A new natural salicylaldehyde analog from Oulenzia sp. (Astigmata: Winterschmitiidae)

Shimizu, Nobuhiro,Kuwahara, Yasumasa

, p. 990 - 992 (2007/10/03)

A new salicyl lactone was detected from the unidentified Oulenzia sp. and its chemical structure was elucidated as 7-hydroxyphthalide (7-hydroxy-3H-isobenzofuran-1-one), based on its GC/MS and GC/FT-IR data and SiO2 column behavior. The compound was synthesized by NaBH4 reduction of 3-hydroxyphthalic anhydride. The GC/MS and GC/FT-IR spectra of the natural compound were consistent with those of the synthetic product. Although the compound is known as a medical material, this is the first example of its presence in nature.

Facile Interconversion of the Isomeric Acid Chlorides Derived from Half Methyl Esters of 3-Methoxyphthalic Acid

Gupta, Dahmendra N.,Hodge, Philip,Hurley, Peter N.

, p. 391 - 394 (2007/10/02)

The isomeric acid chlorides obtained by treating the half methyl esters of 3-methoxyphthalic acid with thionyl chloride interconvert so readily that it is not practical to isolate one acid chloride free of the other.At equilibrium the main isomer is the a

A New Route to 4-Hydroxytetralones and 1-Naphthols

Broom, Nigel J. P.,Sammes, Peter G.

, p. 465 - 470 (2007/10/02)

The lithium salts, derived from position 3 of phthalides by treatment with hindered bases, participate in Michael addition reactions with a variety of conjugated olefins.For singly activated olefins the conjugate anion reacts intramolecularly with the lactone group to produce 4-hydroxytetralones in moderate to good yield.Dehydration of these hydroxytetralones, by brief treatment with acid, produces the corresponding α-naphthol.Substituted phthalides react similarly making the method a general one for the production of substituted α-naphthols.

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