New Efficient Synthesis of 2-Substituted 5,6,7,8-Tetrahydro-benzothieno[2,3-d]pyrimidin-4(3H)-ones
Publication type: Journal Article
Publication date: 2003-12-03
scimago Q2
wos Q2
SJR: 0.559
CiteScore: 4.6
Impact factor: 2.3
ISSN: 00397881, 1437210X
Catalysis
Organic Chemistry
Abstract
The carbodiimides 4, obtained from aza-Wittig reactions of iminophosphorane 3 with aromatic isocyanates, reacted with secondary amines to give 2-dialkylamino-5,6,7,8-tetrahydro-benzothieno[2,3-d]pyrimidin-4(3H)-ones 6 in presence of catalytic EtO - Na + . Reactions of 4 with phenols or ROH in presence of catalytic K 2 CO 3 or RO - Na + gave 2-aryl(alkyl)oxy-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-ones 6 in satisfactory yields. The effects of the nucleophiles on cyclization have been investigated.
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Ding M., Yang S., Zhu J. New Efficient Synthesis of 2-Substituted 5,6,7,8-Tetrahydro-benzothieno[2,3-d]pyrimidin-4(3H)-ones // Synthesis. 2003. Vol. 2004. No. 01. pp. 75-79.
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Ding M., Yang S., Zhu J. New Efficient Synthesis of 2-Substituted 5,6,7,8-Tetrahydro-benzothieno[2,3-d]pyrimidin-4(3H)-ones // Synthesis. 2003. Vol. 2004. No. 01. pp. 75-79.
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TY - JOUR
DO - 10.1055/s-2003-44358
UR - https://doi.org/10.1055/s-2003-44358
TI - New Efficient Synthesis of 2-Substituted 5,6,7,8-Tetrahydro-benzothieno[2,3-d]pyrimidin-4(3H)-ones
T2 - Synthesis
AU - Ding, Ming-Wu
AU - Yang, Shang-jun
AU - Zhu, Jing
PY - 2003
DA - 2003/12/03
PB - Georg Thieme Verlag KG
SP - 75-79
IS - 01
VL - 2004
SN - 0039-7881
SN - 1437-210X
ER -
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BibTex (up to 50 authors)
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@article{2003_Ding,
author = {Ming-Wu Ding and Shang-jun Yang and Jing Zhu},
title = {New Efficient Synthesis of 2-Substituted 5,6,7,8-Tetrahydro-benzothieno[2,3-d]pyrimidin-4(3H)-ones},
journal = {Synthesis},
year = {2003},
volume = {2004},
publisher = {Georg Thieme Verlag KG},
month = {dec},
url = {https://doi.org/10.1055/s-2003-44358},
number = {01},
pages = {75--79},
doi = {10.1055/s-2003-44358}
}
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MLA
Copy
Ding, Ming-Wu, et al. “New Efficient Synthesis of 2-Substituted 5,6,7,8-Tetrahydro-benzothieno[2,3-d]pyrimidin-4(3H)-ones.” Synthesis, vol. 2004, no. 01, Dec. 2003, pp. 75-79. https://doi.org/10.1055/s-2003-44358.