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72681-90-4

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72681-90-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 72681-90-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,6,8 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 72681-90:
(7*7)+(6*2)+(5*6)+(4*8)+(3*1)+(2*9)+(1*0)=144
144 % 10 = 4
So 72681-90-4 is a valid CAS Registry Number.

72681-90-4Relevant articles and documents

Benzylation of alcoholic hydroxyl groups with benzyl mesylate by using a catalytic amount of lithium tetrakis(pentafluorophenyl)borate in the coexistence of lithium triflate and magnesium oxide

Nakano, Masakazu,Matsuo, Jun-Ichi,Mukaiyama, Teruaki

, p. 1352 - 1353 (2000)

Several alcohols possessing alkali-labile substituents such as halogen, ester and ketone were effectively benzylated with benzyl mesylate by using a catalytic amount of lithium tetrakis(pentafluorophenyl)borate [LiB(C6F5)4] in the coexistence of lithium triflate (LiOTf) and magnesium oxide (MgO) to afford the corresponding benzyl ethers in good to excellent yields.

Cu(OTf)2-catalyzed Et3SiH-reductive etherification of various carbonyl compounds with trimethylsilyl ethers

Yang, Wei-Chieh,Lu, Xin-An,Kulkarni, Suvarn S.,Hung, Shang-Cheng

, p. 7837 - 7840 (2007/10/03)

A triethylsilane-reductive etherification of the trimethylsilyl ethers with a variety of carbonyl compounds in good yields at room temperature employing 0.5 mol% Cu(OTf)2 as an extremely efficient catalyst is described here.

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