Erratum to “Zn(OTf)2-catalyzed, microwave-promoted synthesis of 2-substituted 5-methyloxazoles from propargylic amides” (Tetrahedron Letters (2019) 60(11) (777–779), (S0040403919301182), (10.1016/j.tetlet.2019.02.011))

Article abstract of DOI:10.1016/j.tetlet.2019.03.010

The publisher regrets that Tables 1 and 2 in the published article do not appear in the correct format. The tables have been corrected in the online article and can be seen here: The publisher would like to apologise for any inconvenience caused.

Full text of DOI:10.1016/j.tetlet.2019.03.010

Tetrahedron Letters 60 (2019) 1397–1398
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Tetrahedron Letters
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Erratum
Erratum to ‘‘Zn(OTf)2-catalyzed, microwave-promoted synthesis
of 2-substituted 5-methyloxazoles from propargylic amides”
[Tetrahedron Lett. 60 (2019) 777–779]
Alexander Safrygin a, Dmitry Dar’in a, Alexei Lukin b, Anna Bakholdina b, Alexander Sapegin a,
Mikhail Krasavin a,
⇑
a Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
b Lomonosov Institute of Fine Chemical Technologies, MIREA – Russian Technological University, Moscow 119571, Russian Federation
The publisher regrets that Tables 1 and 2 in the published
article do not appear in the correct format. The tables have been
corrected in the online article and can be seen here:
The publisher would like to apologise for any inconvenience
caused.
DOI of original article: https://doi.org/10.1016/j.tetlet.2019.02.011
Corresponding author at: Laboratory of Chemical Pharmacology, Institute of Chemistry, Saint Petersburg State University, 26 Universitetskyi prospekt, Peterhof 198504,
Russian Federation.
⇑
E-mail address: m.krasavin@spbu.ru (M. Krasavin).
https://doi.org/10.1016/j.tetlet.2019.03.010
0040-4039/Ó 2019 Elsevier Ltd. All rights reserved.

1398
A. Safrygin et al. / Tetrahedron Letters 60 (2019) 1397–1398
Table 1
Optimization of 1a ? 3a conversion with respect to temperature and reaction time
under microwave irradiation.
Entry
T (°C)
Time (min)
Isolated yield (%)
1
2
3
4
5
6
7
8
110
130
150
170
150
150
150
150
60
60
60
60
15
30
45
90
40
64
70
70
77
84
73
64
Table 2
Scope of microwave-promoted, Zn(OTf)2-catalyzed preparation of oxazoles 3a-z.
Entry
Product 3
R
Yield of 3, %
Entry
Product 3
R
Yield of 3, %
1
2
3a
3b
Ph(CH2)2
84
81
14
15
3n
3o
4-MeOC6H4
3-ClC6H4
89
91
3
4
3c
3d
i-Bu
56
67
16
17
3p
3q
3-MeOC6H4
2,4-DiClC6H3
86
94
5
6
3e
3f
Bn
77
74
18
19
3r
3s
2-MeOC6H4
1-Naphthyl
77
93
7
8
3g
3h
PhOCH2
c-Hexyl
57a
58
20
21
3t
3u
4-PhC6H4
91
67
9
3i
Ph
78
83
88
22
23
24
3v
3w
3x
75
83
87
10
11
3j
4-FC6H4
4-ClC6H4
3k
12
13
3l
4-O2NC6H4
95
86
25
26
3y
3z
91
57
3m
3-Pyridyl
a
Reaction time – 2 h.