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1638606-74-2

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1638606-74-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1638606-74-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,6,0 and 6 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1638606-74:
(9*1)+(8*6)+(7*3)+(6*8)+(5*6)+(4*0)+(3*6)+(2*7)+(1*4)=192
192 % 10 = 2
So 1638606-74-2 is a valid CAS Registry Number.

1638606-74-2Downstream Products

1638606-74-2Relevant articles and documents

Rhodium(II)-catalyzed intramolecular cycloisomerizations of methylenecyclopropanes with N-Sulfonyl 1,2,3-Triazoles

Chen, Kai,Zhu, Zi-Zhong,Zhang, Yong-Sheng,Tang, Xiang-Ying,Shi, Min

supporting information, p. 6645 - 6649 (2014/07/08)

A novel rhodium(II)-catalyzed tandem cycloisomerization of methylenecyclopropanes (MCPs) with N-sulfonyl 1,2,3-triazoles is disclosed. The reaction produces a series of highly functionalized polycyclic Nheterocycles via a rhodium imino carbene intermediate. A distinct feature of this divergent synthesis is that different types of substrates control the reaction pathways. Moreover, several interesting transformations of these products to construct diazabicyclo[3.2.1]octane derivatives are also reported. The azavinyl rhodium carbenes derived from N-sulfonyltriazole methylenecyclopropanes were found to be very reactive in the divergent synthesis of N-containing heterocycles. Different types of cycloisomerizations were observed depending on the substrates. Derivatization of the products easily gave a series of diazabicyclo[3.2.1]octane derivatives. Bs=bromobenzenesulfonyl, Ms=methanesulfonyl, Piv=pivalate, Ts=4-toluenesulfonyl.

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