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- W2001386281 abstract "The silica gel entrapped bromination reagent, pyridinium hydrobromide perbromide 1 (PHPB@s.g.), was prepared by treatment of 2-[2-(trimethoxysilyl)ethyl]pyridine with concentrated hydrobromic acid and bromine followed by hydrolysis and co-condensation with tetramethoxysilane (TMOS). The entrapped reagent 1 was used for the bromination of alkenes, ketones, and arenes (eq. 1), and was recycled four times with recharge of bromine. One-pot bromination and dehydrobromination processes were achieved by use of 1 and a silica gel entrapped guanidine base 2 (TBD@s.g.) which was prepared from 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) via similar silica sol-gel entrapping to give vinyl bromides or acetylenes (eq. 2)." @default.
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- W2001386281 date "2006-06-01" @default.
- W2001386281 modified "2023-09-26" @default.
- W2001386281 title "One-Pot Bromination and Dehydrobromination" @default.
- W2001386281 doi "https://doi.org/10.1055/s-2006-941896" @default.
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