But-2-ynylbisoxycarbonyl chloride: A novel C2-symmetric reagent for the protection of amines and amino acids

Organic Letters

Volumn 7, Issue 22, 2005, Pages 4947-4950

  Ramesh, R ^a   Chandrasekaran, S ^a  

^a INDIAN INSTITUTE OF SCIENCE   (India)

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Indexed keywords

EID: 27644510884     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol051960z     Document Type: Article

References (10)

1. Bhat, R. G.; Sinha, S.; Chandrasekaran, S. Chem. Commun. 2002, 8, 812.
2. Sinha, S.; Ilankumaran, P.; Chandrasekaran, S. Tetrahedron Lett. 1999, 40, 771.
3. Sridhar, P. R.; Chandrasekaran, S. Org. Lett. 2002, 4, 4731.
4. Swamy, V. M.; Ilankumaran, P.; Chandrasekaran, S. Synlett 1997, 5, 513.
5. Ilankumaran, P.; Manoj, N.; Chandrasekaran, S. Chem. Commun. 1996, 16, 1957.
6. Ramesh, R.; Bhat, R. G.; Chandrasekaran, S. J. Org. Chem. 2005, 70, 837.
7. w = 0.1285.
8. All the compounds (5a-h, except 5e and 5f) were crystalline and could easily be purified by recrystallizing from hot ethyl acetate. Compounds 5e and 5f were crystallized from ethyl acetate-hexane mixture over a long period of time.
9. Lott, R. S.; Chauhan, V. S.; Stammer, C. H. J. Chem. Soc., Chem. Commun. 1979, 495.
10. NMR spectra and HPLC profile of the peptide 9 did not show the presence of any diastereomer.