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1228005-77-3

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1228005-77-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1228005-77-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,8,0,0 and 5 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1228005-77:
(9*1)+(8*2)+(7*2)+(6*8)+(5*0)+(4*0)+(3*5)+(2*7)+(1*7)=123
123 % 10 = 3
So 1228005-77-3 is a valid CAS Registry Number.

1228005-77-3Downstream Products

1228005-77-3Relevant academic research and scientific papers

Silver-catalyzed aldehyde olefination using siloxyalkynes

Sun, Jianwei,Keller, Valerie A.,Meyer, S. Todd,Kozmin, Sergey A.

, p. 839 - 842 (2010)

We describe the development of a silvercatalyzed carbonyl olefination employing electronrich siloxyalkynes. This process constitutes an efficient synthesis of trisubstituted unsaturated esters, and represents an alternative to the widely utilized Horner-Wadsworth-Emmons reaction. Excellent diastereoselectivities are observed for a range of aldehydes using either 1-siloxy-l-propyne or 1-siloxy1-hexyne. This mild catalytic process also enables chemoselective olefination of aldehydes in the presence of either ester or ketone functionality. Furthermore, since no by-products are generated, this catalytic process is perfectly suited for development of sequential reactions that can be carried out in a single flask.

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