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18236-57-2

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18236-57-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18236-57-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,2,3 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 18236-57:
(7*1)+(6*8)+(5*2)+(4*3)+(3*6)+(2*5)+(1*7)=112
112 % 10 = 2
So 18236-57-2 is a valid CAS Registry Number.

18236-57-2Relevant articles and documents

Stereo- And regio-selective synthesis of silicon-containing diborylalkenes: via platinum-catalyzed mono-lateral diboration of dialkynylsilanes

Long, Peng-Wei,Xie, Jia-Le,Yang, Jing-Jing,Lu, Si-Qi,Xu, Zheng,Ye, Fei,Xu, Li-Wen

supporting information, p. 4188 - 4191 (2020/04/22)

A highly chemoselective platinum-catalyzed mono-lateral diboration of dialkynylsilanes for the construction of silicon-tethered alkynyl diborylalkenes is described, in which tris(4-methoxyphenyl)phosphine was found to be an effective ligand for the cis-addition of diboron agents to the silicon-tethered alkynes, and the chiral ligand (AFSi-Phos)-mediated diboration of dialkynylsilanes resulted in the desymmetric construction of silicon-stereogenic centers with promising enantioselectivity.

Macrocyclic polyether compounds

-

, (2008/06/13)

Macrocyclic polyether "crown" compounds of the formula EQU1 WHEREIN T is a C2 -C3 alkylene, A is EQU2 R being H or C1 -C18 alkyl, R2 and R3 being independently C1 -C18 alkyl, C2 -C4 alkenyl, or C6 -C14 aryl; Q and Z are independently 1,2-arylene (or saturated derivatives thereof) or substituted 1,2-arylene (or saturated derivatives thereof); a is 0, 1, 2, or 3; b is an integer from 3 to 20; y is 1 or zero; x1, x2, x3, and x4 are integers independently selected to give a 15-60 atom ring. Such crown compounds are generally useful in the formation of complexes with ionic metal compounds, thus making it possible to use certain chemical reagents in media wherein they are normally insoluble.

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