+++ ScienceDirect(2 статьи) Спасибо Arkadii_Tarasevy

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Помогите пожалуйста со статьями:

3)
Boyapati M. Choudary, , Naidu S. Chowdari and Mannepalli L. Kantam
Montmorillonite Clay Catalyzed Tosylation of Alcohols and Selective Monotosylation of Diols with p-Toluenesulfonic Acid: An Enviro-Economic Route*1
Tetrahedron
Volume 56, Issue 37, 8 September 2000, Pages 7291-7298

DOI:

http://dx.doi.org/doi:10.1016/S0040-4020(00)00626-8

4)
B. M. Choudary, *, N. Sreenivasa Chowdari, M. Lakshmi Kantam and R. Kannan
Fe(III) exchanged montmorillonite: A mild and ecofriendly catalyst for sulfonylation of aromatics
Tetrahedron Letters
Volume 40, Issue 14, 2 April 1999, Pages 2859-2862

DOI:

http://dx.doi.org/doi:10.1016/S0040-4039(99)00312-3

Заранее огромное спасибо!

[Arkadii_Tarasevych]

3, 4

[SashaRad]

Спасибо большое Arkadii_Tarasevych!