Systematic study on acylation of methyl 3-aminocrotonate with acid chlorides of aliphatic, aromatic and α, β-unsaturated acids: A comparative evaluation of the preference for regio- and stereoselectivity vis-à-vis 3-aminocrotononitrile (Record no. 16092)

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control field OSt
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20220128154402.0
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fixed length control field 220128b xxu||||| |||| 00| 0 eng d
040 ## - CATALOGING SOURCE
Original cataloging agency AIKTC-KRRC
Transcribing agency AIKTC-KRRC
100 ## - MAIN ENTRY--PERSONAL NAME
9 (RLIN) 15647
Author Mukherjee, Attreyee
245 ## - TITLE STATEMENT
Title Systematic study on acylation of methyl 3-aminocrotonate with acid chlorides of aliphatic, aromatic and α, β-unsaturated acids: A comparative evaluation of the preference for regio- and stereoselectivity vis-à-vis 3-aminocrotononitrile
250 ## - EDITION STATEMENT
Volume, Issue number Vol.60B(2), Feb.
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Place of publication, distribution, etc. New Delhi
Name of publisher, distributor, etc. CSIR
Year 2021
300 ## - PHYSICAL DESCRIPTION
Pagination 291-302p.
520 ## - SUMMARY, ETC.
Summary, etc. Acylation of methyl 3-aminocrotonate 1a in benzene with a variety of aliphatic and aromatic acid chlorides including α, β-unsaturated acid chloride in the presence of an added organic base, (either pyridine or triethylamine) is reported. The preferred N, C-site selectivity in these reactions has been compared with the terminal selectivity of the products obtained previously on acylation of methyl 3-aminocrotononitrile 1b. A strong preference either for N- or C- selectivity in N, C-acylation has been observed for both 1a and 1b based on the choice of acid chlorides and added organic base. Interestingly, irrespective of the enamine 1a or 1b, acylation with α, β-unsaturated acid chlorides in the presence of triethylamine afforded 3,4-dihydropyridin-(2H)-one via [3.3] sigmatropic rearrangement of the corresponding intermediary N(E)-enamide. Accrued results show methyl 3-aminocrotonate to be a better precursor for preparation of enamides (N-acylated products) whereas 3-aminocrotononitrile is found to be a preferred choice for preparation of enaminones (C-acylated products). An attempt is made to offer a preliminary theoretical interpretation for observed site selectivity.
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
9 (RLIN) 5009
Topical term or geographic name entry element GENERAL CHEMISTRY
700 ## - ADDED ENTRY--PERSONAL NAME
9 (RLIN) 15648
Co-Author Mahalanabis, Kumar K.
773 0# - HOST ITEM ENTRY
Place, publisher, and date of publication New Delhi NISCAIR-CSIR 2005
Title Indian journal of chemistry (Section B)
856 ## - ELECTRONIC LOCATION AND ACCESS
URL http://nopr.niscair.res.in/bitstream/123456789/56209/1/IJCB%2060B%282%29%20291-302.pdf
Link text Click here
942 ## - ADDED ENTRY ELEMENTS (KOHA)
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Koha item type Articles Abstract Database
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          School of Pharmacy School of Pharmacy Archieval Section 2022-01-28 2022-0238 2022-01-28 2022-01-28 Articles Abstract Database
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