Agent for introducing protecting group for hydroxy group and/or mercapto group
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United States of America Patent
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Dec 25, 2018
Grant Date -
Oct 26, 2017
app pub date -
Sep 30, 2015
filing date -
Oct 7, 2014
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Abstract
A novel agent for introducing a protecting group for a hydroxy group and/or a mercapto group that can be introduced and removed under mild conditions is provided. The agent for introducing a protecting group for a hydroxy group and/or mercapto group of a substrate compound having the hydroxy group and/or mercapto group is represented by the following formula (I), wherein A represents a ring structure having 1 to 5 rings in which two carbon atoms of an adjacent benzene ring are included, the ring structure comprises a substituted or unsubstituted five-membered ring or six-membered ring and optionally include a heterocycle; each of R1, R2, R3, and R4 is independently a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms; and X is a halogen atom or OSO2R5 (R5=an aryl group or an alkyl group).
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