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83720-10-9

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83720-10-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83720-10-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,7,2 and 0 respectively; the second part has 2 digits, 1 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 83720-10:
(7*8)+(6*3)+(5*7)+(4*2)+(3*0)+(2*1)+(1*0)=119
119 % 10 = 9
So 83720-10-9 is a valid CAS Registry Number.
InChI:InChI=1/C12H22O4/c1-2-9-3-4-12(15-7-9)5-11(14)10(6-13)8-16-12/h9-11,13-14H,2-8H2,1H3/t9-,10-,11+,12-/m1/s1

83720-10-9Relevant articles and documents

An Enantioselective Total Synthesis of (-)-Talaromycins A and B

Smith, Amos B.,Thompson, Andrew S.

, p. 1469 - 1471 (1984)

The first enantioselective total synthesis of (-)-talaromycin A and B from a common advanced intermediate is described.

Enantioselective Total Synthesis of the Mycotoxin (-)-Talaromycin B by a Hetero Diels-Alder Reaction

Tietze, Lutz F.,Schneider, Christoph

, p. 2476 - 2481 (2007/10/02)

(-)-Talaromycin B was formed in an overall yield of 5 percent in nine steps via a hetero Diels-Alder reaction of the exocyclic vinyl ether 3 and methyl O-benzoyldiformylacetate (4) as the key transformation.The enantiomerically pure vinyl ether 3 was prep

Synthesis of Talaromycins A, B, C, and E

Baker, Raymond,Boyes, Alastairs L.,Swain, Christopher J.

, p. 1415 - 1421 (2007/10/02)

The synthesis of 2,2-diethyl-5-ethynyl-1,3-dioxane (9) is reported in an overall yield of 27percent from diethyl malonate.Addition of 5-ethyl tetrahydropyran-2-one to the lithium anion of (9) gave the hydroxy ketoacetylene (10) which was converted in four steps to the olefinic spiroacetals (19) and (20), which were obtained in a ratio of 2:1.The individual olefinic spiroacetals (19) and (20) gave access to the (+/-)-talomycins A and C, and B and E via a chlorohydration, reductive dechlorination, and deprotection sequence.

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