+++Thanks macro_1 article from RSC & 1 from sciencedirect

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1. Title: The mechanism of thermal eliminations. Part 18. Relative rates of pyrolysis of 2-ethoxypyrazine, 3-ethoxypyridazine, 2- and 4-ethoxypyrimidine, 3-chloro-6-ethoxypyridazine, and 2-chloro-4-ethoxypyrimidine: the effect of the aza ‘substituent’ and π-bond order on the elimination rate Nouria Al-Awadi and Roger Taylor
J. Chem. Soc., Perkin Trans. 2, 1986, 1255-1258

DOI:

http://dx.doi.org/10.1039/P29860001255

link:

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http://pubs.rsc.org/en/content/articlelanding/1986/p2/p29860001255

2. title: Novel pyrrolopyrimidine analogues as potent dipeptidyl peptidase IV inhibitors based on pharmacokinetic property-driven optimization Original Research Article
European Journal of Medicinal Chemistry, Volume 52, June 2012, Pages 205-212
Hui Xie, Lili Zeng, Shaogao Zeng, Xin Lu, Guicheng Zhang, Xin Zhao, Na Cheng, Zhengchao Tu, Zhiyuan Li, Hongjiang Xu, Ling Yang, Xiquan Zhang, Min Huang, Junling Zhao, Wenhui Hu

DOI:

http://dx.doi.org/10.1016/j.ejmech.2012.03.015

link:

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http://www.sciencedirect.com/science/article/pii/S0223523412001778

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