<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Baruah, Kalpita</style></author><author><style face="normal" font="default" size="100%">Sahariah, Biswajit</style></author><author><style face="normal" font="default" size="100%">Sakpal, Sushil S.</style></author><author><style face="normal" font="default" size="100%">Deka, Jugal Kishore Rai</style></author><author><style face="normal" font="default" size="100%">Bar, Arun Kumar</style></author><author><style face="normal" font="default" size="100%">Bagchi, Sayan</style></author><author><style face="normal" font="default" size="100%">Sarma, Bani Kanta</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Stabilization of Azapeptides by N-amide center dot center dot center dot H-N-amide Hydrogen Bonds</style></title><secondary-title><style face="normal" font="default" size="100%">Organic Letters</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2021</style></year><pub-dates><date><style  face="normal" font="default" size="100%">JUL </style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">23</style></volume><pages><style face="normal" font="default" size="100%">4949-4954</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">An unusual N-amide center dot center dot center dot H-Namide hydrogen bond (HB) was previously proposed to stabilize the azapeptide beta-turns. Herein we provide experimental evidence for the N-amide center dot center dot center dot H-Namide HB and show that this HB endows a stabilization of 1-3 kcal.mol(-1) and enforces the trans-cis-trans (t-c-t) and cis-cis-trans (c-c-t) amide bond conformations in azapeptides and N-methyl-azapeptides, respectively. Our results indicate that these N-amide center dot center dot center dot H-Namide HBs can have stabilizing contributions even in short azapeptides that cannot fold to form beta-turns.</style></abstract><issue><style face="normal" font="default" size="100%">13</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">Foreign</style></custom3><custom4><style face="normal" font="default" size="100%">6.005</style></custom4></record></records></xml>