کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5270400 1385415 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Amino acid intercalated layered double hydroxide catalyzed chemoselective methylation of phenols and thiophenols with dimethyl carbonate
ترجمه فارسی عنوان
آمینو اسید هیدروکسید دو لایه را تشدید متیلاسیون شیمیایی فنل ها و تیوفنول ها با دی متیل کربنات
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

Sixteen different amino acids are intercalated into Mg-Al layered double hydroxides (LDHs) by the reconstruction method and are characterized by powder XRD and FT-IR. The intercalated amino acid-LDHs (AA-LDHs) are used as catalysts for chemoselective O-methylation of phenol and S-methylation of thiophenol with dimethyl carbonate (DMC) as a green methylating agent. The intercalation behavior of various amino acids is influenced by various structural features of amino acids, namely, carbon chain length, structure, and physicochemical properties. In particular, amino acids possessing a hydrophobic side-chain show higher catalytic activity. A suitable reaction mechanism is proposed. The catalyst can also be recycled.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 54, Issue 52, 25 December 2013, Pages 7167-7170
نویسندگان
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