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1220116-81-3

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1220116-81-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1220116-81-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,0,1,1 and 6 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1220116-81:
(9*1)+(8*2)+(7*2)+(6*0)+(5*1)+(4*1)+(3*6)+(2*8)+(1*1)=83
83 % 10 = 3
So 1220116-81-3 is a valid CAS Registry Number.

1220116-81-3Downstream Products

1220116-81-3Relevant articles and documents

Anti -diastereo- and enantioselective carbonyl (hydroxymethyl)allylation from the alcohol or aldehyde oxidation level: Allyl carbonates as allylmetal surrogates

Zhang, Yong Jian,Yang, Jin Haek,Kim, Sang Hoon,Krische, Michael J.

supporting information; experimental part, p. 4562 - 4563 (2010/06/13)

Enantioselective transfer hydrogenation of carbonate 1a in the presence of aromatic, allylic, or aliphatic alcohols 2a-2i employing a cyclometalated iridium C,O-benzoate derived from allyl acetate, 4-cyano-3-nitrobenzoic acid and (S)-SEGPHOS delivers products of (hydroxymethyl)allylation 4a-4i in good isolated yields (60-74%), good anti-diastereoselectivities (5:1-10:1 dr) and exceptional levels of enantiocontrol (93-99% ee). Under identical reaction conditions, but in the presence of isopropanol, aldehydes 3a-3i are converted to an equivalent set of adducts 4a-4i in good isolated yields (58-74%), good anti-diastereoselectivities (4:1-14:1 dr), and exceptional levels of enantiocontrol (95-99% ee). Thus, identical sets of adducts 4a-4i are produced with equal facility from the alcohol or aldehyde oxidation level. These studies represent the first general method for enantioselective carbonyl (hydroxymethyl)allylation, a process that has no highly stereoselective counterpart in conventional allylmetal chemistry.

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