Flash chemistry enables high productivity metalation-substitution of 5-alkyltetrazoles
作者:Jeff Y. F. Wong、Christopher G. Thomson、Filipe Vilela、Graeme Barker
DOI:10.1039/d1sc04176b
日期:——
Tetrazoles play a prominent role in medicinal chemistry due to their role as carboxylate bioisosteres but have largely been overlooked as C–H functionalisation substrates. We herein report the development of a high-yielding and general procedure for the heterobenzylic C–H functionalisation of 5-alkyltetrazoles in up to 97% yield under batch conditions using a metalation/electrophilic trapping strategy
METHODS FOR MAKING 4-TETRAZOLYL-4-PHENYLPIPERIDINE COMPOUNDS
申请人:EURO-CELTIQUE S.A.
公开号:EP1709029A2
公开(公告)日:2006-10-11
Methods for making 4-tetrazolyl-4-phenylpiperidine compounds
申请人:Brown Kevin
公开号:US20070072909A1
公开(公告)日:2007-03-29
Methods, composition, and intermediates are disclosed that are useful for making 4-Tetrazolyl-4-phenylpiperidine Compounds according to Formula I,
where Ar
1
is —C
3
-C
8
cycloalkyl, phenyl, naphthyl, anthryl, phenanthryl or -(5-7-membered) heteroaryl, each being unsubstituted or substituted with one or more R
2
groups; Ar
2
is phenyl, naphthyl, anthryl, phenanthryl or -(5-7-membered) heteroaryl, each being unsubstituted or substituted with one or more R
2
groups; Z
1
and Z
2
are each independently a —(C
1
-C
4
alkyl) group; R
1
is —(CH
2
)
n
C(O)N(R
3
)(R
4
) where R
3
and R
4
are each independently H or —(C
1
-C
4
alkyl); R
2
is halogen, —C
1
-C
3
alkyl, —O—(C
1
-C
3
alkyl), —NH(C
1
-C
3
alkyl) or —N(C
1
-C
3
alkyl)
2
; n is an integer ranging from 1 to 4; m is an integer ranging from 0 to 4; and, in certain embodiments, the phenyl moiety attached to the 4-position of the piperidine ring of a compound according to Formula I can be optionally substituted with one or more R
2
groups.