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53403-04-6

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53403-04-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53403-04-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,4,0 and 3 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 53403-04:
(7*5)+(6*3)+(5*4)+(4*0)+(3*3)+(2*0)+(1*4)=86
86 % 10 = 6
So 53403-04-6 is a valid CAS Registry Number.

53403-04-6Relevant articles and documents

Mild Ring-Opening 1,3-Hydroborations of Non-Activated Cyclopropanes

Wang, Di,Xue, Xiao-Song,Houk, Kendall N.,Shi, Zhuangzhi

supporting information, p. 16861 - 16865 (2018/11/27)

The Brown hydroboration reaction, first reported in 1957, is the addition of B?H across an olefin in an anti-Markovnikov fashion. Here, we solved a long-standing problem on mild 1,3-hydroborations of non-activated cyclopropanes. A three-component system including cyclopropanes, boron halides, and hydrosilanes has been developed for borylative ring-opening of cyclopropanes following the anti-Markovnikov rule, under mild reaction conditions. Density functional theory (M06-2X) calculations show that the preferred pathway involves a cationic boron intermediate which is quenched by hydride transfer from the silane.

Cyclopropanation of alkenes with CH2I2/Et3Al by the phase-vanishing method based on fluorous phase screen

Matsubara, Hiroshi,Tsukida, Masaaki,Yasuda, Shinji,Ryu, Ilhyong

scheme or table, p. 951 - 954 (2009/04/04)

Phase-vanishing (PV) method using perfluorohexanes as a screen phase was applied to cyclopropanation reactions with CH2I2/Et2Zn and CH2I2/Et3Al. When Et3Al was used as a carbenoid generator, the reaction proceeded smoothly and desired cyclopropane derivatives were obtained in high yield. The PV cyclopropanation took 2 or 3 days to complete, however, reduction of reaction time by a factor of 2-3 was also achieved by vigorous stirring after the bottom CH2I2 layer disappeared.

Processing of cyclopropylarenes by toluene dioxygenase: Isolation and absolute configuration of metabolites

Finn, Kevin J.,Rochon, Lena,Hudlicky, Tomas

, p. 3606 - 3613 (2007/10/03)

Several arenes possessing a cyclopropyl substituent were subjected to enzymatic oxidation with toluene dioxygenase. The absolute configuration of metabolites was established by chemical means.

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