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4805-28-1

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4805-28-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4805-28-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,8,0 and 5 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4805-28:
(6*4)+(5*8)+(4*0)+(3*5)+(2*2)+(1*8)=91
91 % 10 = 1
So 4805-28-1 is a valid CAS Registry Number.

4805-28-1Downstream Products

4805-28-1Relevant articles and documents

NHC-catalyzed [4 + 2] annulations of allenoates and 2,3-dioxopyrrolidine derivatives

Chen, Yangxu,Li, Tuanjie,Lu, Fangfang,Song, Xue,Yao, Changsheng,Yu, Chenxia,Zhang, Kai

, p. 1219 - 1225 (2022/02/21)

A facile NHC-catalyzed [2 + 4] annulation of allenoates with 2,3-dioxypyrrolidine derivatives was discovered, which paved a new avenue for the construction of highly substituted pyranopyrrole with moderate to good yields, high atom economy and mild reaction conditions. This journal is

Au(I)/(R)-BINOL-Ti(IV) concerted catalyzed asymmetric cascade cycloaddition reaction of arylalkynols

Wang, Hongkai,Zeng, Tianlong,Chang, Weixing,Liu, Lingyan,Li, Jing

, p. 3573 - 3577 (2021/05/31)

An efficient catalytic asymmetric cascade cycloaddition reaction of arylalkynols with dioxopyrrolidines was developed. This reaction was achieved using Au(I) and (R)-BINOL-Ti(IV) bimetallic catalysts and exclusively delivered a series of chiral oxo-bridged bicyclic benzooxacine compounds in up to 86% yield with 96% ee as well as >33:1 dr. Meanwhile, three new σ bonds and three new stereogenic centers were formed in a one-pot process.

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