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- W2022710141 abstract "2-[4-(tert-Butoxycarbonyl)piperazinyl]benzylidene-tert-butanesulfinamides underwent nucleophilic 1,2-addition with different organometallic reagents to give highly diastereomerically enriched adducts. X-ray crystallography of the resulting α-branched N-Boc-2-piperazinylbenzyl-tert-butanesulfinamides confirms different mechanisms depending on the organometallic reagent used. Differential deprotection of the N-Boc and the tert-butanesulfinamides was investigated, and the dehydration byproducts have been identified and characterized. To avoid the formation of byproducts in the acidic deprotection step, the N-tert-butanesulfinamide group was converted to the corresponding N-tert-butanesulfonamide (Bus), which allowed for clean orthogonal deprotection. The efficient synthesis and deprotection of the N-Boc-2-piperazinylbenzyl-tert-butanesulfinamides herein described constitutes an attractive method for extensive structure−activity studies in the search for novel ligands of the human melanocortin 4 receptor." @default.
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- W2022710141 date "2005-09-24" @default.
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- W2022710141 title "Practical Asymmetric Synthesis of α-Branched 2-Piperazinylbenzylamines by 1,2-Additions of Organometallic Reagents to <i>N</i>-<i>tert</i>-Butanesulfinyl Imines" @default.
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- W2022710141 doi "https://doi.org/10.1021/jo051514p" @default.
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