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93305-56-7

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93305-56-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 93305-56-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,3,0 and 5 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 93305-56:
(7*9)+(6*3)+(5*3)+(4*0)+(3*5)+(2*5)+(1*6)=127
127 % 10 = 7
So 93305-56-7 is a valid CAS Registry Number.

93305-56-7Downstream Products

93305-56-7Relevant articles and documents

Chiral quaternary ammonium aryloxide/N,O-bis(trimethyl-silyl)acetamide combination as efficient organocatalytic system for the direct vinylogous aldol reaction of (5H)-furan-2-one derivatives

Claraz, Aurelie,Oudeyer, Sylvain,Levacher, Vincent

, p. 841 - 846 (2013)

A chiral quaternary ammonium amide was generated in situ from N,O-bis(trimethylsilyl)acetamide (BSA) as non-nucleophilic Bronsted base precursor and the combination of chiral quaternary ammonium halide/sodium aryloxide as chiral Lewis base. This system was applied to an anti-selective organocatalytic direct vinylogous aldol (ODVA) reaction of (5H)-furan-2-one derivatives with aldehydes. Several 5-(1′-hydroxy)-γ-butenolides were obtained in good diastereomeric ratios (up to 95/5) and excellent enantioselectivities (up to 94%) with both aliphatic or (hetero)aromatic aldehydes, so providing a rare example of general and efficient conditions for the ODVA reaction. Copyright

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