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139402-21-4

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139402-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139402-21-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,0 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139402-21:
(8*1)+(7*3)+(6*9)+(5*4)+(4*0)+(3*2)+(2*2)+(1*1)=114
114 % 10 = 4
So 139402-21-4 is a valid CAS Registry Number.
InChI:InChI=1/C20H16O7/c21-20-16-12(18(27-20)11-2-1-3-14-19(11)26-9-24-14)7-22-17(16)10-4-5-13-15(6-10)25-8-23-13/h1-6,12,16-18H,7-9H2/t12-,16-,17+,18+/m1/s1

139402-21-4SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name (3R,3aR,6R,6aS)-6-(1,3-benzodioxol-4-yl)-3-(1,3-benzodioxol-5-yl)-3,3a,6,6a-tetrahydro-1H-furo[3,4-c]furan-4-one

1.2 Other means of identification

Product number -
Other names epiaptosimon

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:139402-21-4 SDS

139402-21-4Relevant articles and documents

Synthesis of (+)-aptosimon, a 4-oxofurofuran lignan, by erythro selective aldol condensation and stereoconvergent cyclization as the key reactions

Yamauchi, Satoshi,Yamaguchi, Munetoshi

, p. 838 - 846 (2007/10/03)

The 4-oxofurofuran lignan, (+)-aptosimon (1), was synthesized from γ-butyrolactone (9). To construct the two benzylic chiral center of (+)-aptosimon (1), highly erythro selective aldol condensation and stereoconvergent SN1 intramolecular cyclization were used as the key reactions.

Synthesis of endo,exo-furofuranones using a highly diastereoselective C-H insertion reaction

Brown, Richard C.D.,Hinks, Jeremy D.

, p. 1895 - 1896 (2007/10/03)

A highly stereoselective ring closure of α-diazo-γ-butyrolactones to form the 2,6-diaryl-3,7-dioxabicyclo[3.3.0]octane ring system is reported; a formal synthesis of the furofuran lignan asarinin 1 is also described.

Synthetic methods for (Exo,Exo)- and (Exo-,Endo)-2,6-diarylbicyclo[3:3:0]octane lignans: Syntheses of (±)-aptosimon, (±)-styraxin, (±)-asarinin, and (±)-pluviatilol

Stevens,Whiting

, p. 4629 - 4632 (2007/10/02)

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