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1092969-83-9

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1092969-83-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1092969-83-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,9,2,9,6 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1092969-83:
(9*1)+(8*0)+(7*9)+(6*2)+(5*9)+(4*6)+(3*9)+(2*8)+(1*3)=199
199 % 10 = 9
So 1092969-83-9 is a valid CAS Registry Number.

1092969-83-9Relevant articles and documents

Metastable liquid crystal as time-responsive reaction medium: Aging-induced dual enantioselective control

Ishida, Yasuhiro,Matsuoka, Yuki,Kai, Yukiko,Yamada, Kuniyo,Nakagawa, Kenta,Asahi, Toru,Saigo, Kazuhiko

, p. 6407 - 6410 (2013)

A metastable liquid crystal (LC) was found to serve as a time-responsive reaction medium, in which the enantioselectivity of a photoreaction was perfectly switched through isothermal annealing of the reaction system. When the LC salt of an enantiopure amine with a photoreactive acid was irradiated with UV/vis light, in situ photodimerization of the acid moiety proceeded smoothly to afford the (+)-isomer of the photodimer with high enantioselectivity (+86% ee). In contrast, photoirradiation of an aged sample, isothermally annealed for 20 h, gave predominantly the (-)-isomer (-94% ee). Systematic studies revealed that the reversal in selectivity originated from metastability of the LC system, which gradually transformed into a crystalline phase during annealing. This finding demonstrates the potential use of metastable aggregates as dynamic time-responsive media, reminiscent of biological systems.

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