By Alfredo Ricci
Right here, the most vital practical crew in natural chemistry is mentioned in a single convenient quantity. The monograph covers its software -- from common items to man made prescription drugs -- detailing complicated syntheses utilizing the amino staff as templates and smooth innovations focussing at the advent of the amino workforce. A definitive must-have for each chemist.
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Extra info for Amino Group Chemistry: From Synthesis to the Life Sciences
The contents were transferred to a separating funnel with H2O (200 mL), the organic phase was isolated, and the aqueous layer was extracted with CH2Cl2 (200 mL). The combined extracts were washed with H2O (6 × 300 mL) and concentrated in vacuo to afford 12 g of a dark green solid. The solid materials were dissolved in CH2Cl2 (50–75 mL) and ﬁltered through a 70 × 200 mm plug of Brockmann activity-IV basic Al2O3 with CH2Cl2 as the eluent. A dark green band was collected as a single fraction and the solvent was removed in vacuo.
33). 34 Synthesis of tetrasubstituted ethylenes. 35 Synthesis of tetrasubstituted 1-arylimidazoles. arene diazonium salts and subsequent treatment with sodium p-tolyl sulﬁnate . There are some reports on the synthesis of amino compounds by treatment of 26 with carbanions. 34) . Nucleophilic attack of the carbanion at the N=N double bond of 26a and subsequent elimination of a tosylamide anion gives N-arylimines, on which a second nucleophilic attack by the carbanion proceeds to give tetrasubstituted ethylenes.
These severe reaction conditions prevent the application to polyfunctionalized compounds containing carbonyl groups and halogen equivalents. To solve these problems, a number of alternatives to phthalimide have been developed in order to allow the second deprotection step to be carried out under milder conditions. 2 , whereas other Gabriel-type reagents developed recently are covered in the following examples. 2 Gabriel-type reagents. 72 Synthesis of protected primary amines by Mitsunobu alkylation of 48.