Synthesis 2020; 52(21): 3243-3252
DOI: 10.1055/s-0040-1707132
special topic
© Georg Thieme Verlag Stuttgart · New York

Highly Selective Synthesis of α-Hydroxy, α-Oxy, and α-Oxo Amides by a Post-Passerini Condensation Transformation

Morteza Shiri
a   Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran   Email: mshiri@alzahra.ac.ir
,
Zahra Gholami-Koupaei
a   Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran   Email: mshiri@alzahra.ac.ir
,
Farzaneh Bandehali-Naeini
a   Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran   Email: mshiri@alzahra.ac.ir
,
Maryam-Sadat Tonekaboni
a   Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran   Email: mshiri@alzahra.ac.ir
,
Saeedeh Soheil-Moghaddam
a   Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran   Email: mshiri@alzahra.ac.ir
,
Delaram Ebrahimi
a   Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran   Email: mshiri@alzahra.ac.ir
,
Sima Karami
a   Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran   Email: mshiri@alzahra.ac.ir
,
Behrouz Notash
b   Department of Inorganic Chemistry and Catalysis, Shahid Beheshti University, General Campus, Evin, Tehran 1983963113, Iran
› Author Affiliations
The Alzahra University and the Iran National Science Foundation (INSF­) are gratefully acknowledged for support.
Further Information

Publication History

Received: 19 April 2020

Accepted after revision: 06 May 2020

Publication Date:
08 June 2020 (online)


Published as part of the Special Topic Recent Advances in Amide Bond Formation

Abstract

A post-Passerini condensation transformation can be employed in the synthesis of three types of amides: α-hydroxy, α-oxy, and α-oxo amides. K2CO3 efficiently promotes the solvolysis of α-acetoxy amides to form α-hydroxy amides in methanol. 2-Acetoxy-2-(2-alkynyl­quinolin-3-yl)acetamides in basic methanol are cyclized to 1,3-dihydrofuro[3,4-b]quinoline-1-carboxamides via deacetylation and 5-exo-dig cyclization. Treatment of 2-hydroxy-2-[2-(phenylethynyl)quinolin-3-yl]acetamides with I2 in basic media produces pyrrolo[2,3-b]quinoline-2,3-diones. This cyclization involves intramolecular cyclization, dealkynylative aromatization, and oxidation of the secondary alcohol.

Supporting Information