3899-90-9 Usage
General Description
P-Toluenesulfonic acid 3-nitrophenyl ester is a chemical compound with the molecular formula C14H13NO5S. It is commonly used as a reagent in organic synthesis and a catalyst in various chemical reactions. P-TOLUENESULFONIC ACID 3-NITROPHENYL ESTER is a highly reactive and potent electrophile, making it valuable for the acylation and alkylation of nucleophiles in organic chemistry. It is also used as a coupling agent in the synthesis of pharmaceuticals, dyes, and other organic compounds. Additionally, it is known for its ability to catalyze the formation of carbon-carbon and carbon-heteroatom bonds, making it widely utilized in the production of various fine chemicals. However, it is important to handle this compound with caution as it is toxic and can cause irritation to the skin, eyes, and respiratory system.
Check Digit Verification of cas no
The CAS Registry Mumber 3899-90-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,8,9 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 3899-90:
(6*3)+(5*8)+(4*9)+(3*9)+(2*9)+(1*0)=139
139 % 10 = 9
So 3899-90-9 is a valid CAS Registry Number.
InChI:InChI=1/C13H11NO5S/c1-10-5-7-13(8-6-10)20(17,18)19-12-4-2-3-11(9-12)14(15)16/h2-9H,1H3
3899-90-9Relevant articles and documents
Gold(I)-Catalyzed N-Desulfonylative Amination versus N-to-O 1,5-Sulfonyl Migration: A Versatile Approach to 1-Azabicycloalkanes
Miaskiewicz, Solène,Gaillard, Boris,Kern, Nicolas,Weibel, Jean-Marc,Pale, Patrick,Blanc, Aurélien
, p. 9088 - 9092 (2016/07/26)
Valuable 1-azabicycloalkane derivatives have been synthesized through a novel gold(I)-catalyzed desulfonylative cyclization strategy. An ammoniumation reaction of ynones substituted at the 1-position with an N-sulfonyl azacycle took place in the presence of a gold cation by intramolecular cyclization of the disubstituted sulfonamide moiety onto the triple bond. Depending on the size of the heterocyclic ring and substitution of the substrates, two unprecedented forms of nucleophilic attack on the sulfonyl group were exploited, that is, a N-desulfonylation in the presence of an external protic O nucleophile (37–87 %, 10 examples) and a unique N-to-O 1,5-sulfonyl migration (60–98 %, 9 examples).