Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran
Contribution to the Chemistry of Boron, 201. ‐ Boration of Lactams and Ureas by an Amino‐Imino‐Borane Pyrrolidon reacts with ( tert ‐butylimino)(2,2,6,6‐tetramethylpiperidino)borane ( 1 ) to give the N ‐borated lactam 2 . Diketopiperazine behaves similarly. It is borated on both of its N atoms to fo...
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crwiley:10.1002/cber.19901230307 2024-06-02T08:05:11+00:00 Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran Geisberger, Gilbert Neukirchinger, Katharina Nöth, Heinrich 1990 http://dx.doi.org/10.1002/cber.19901230307 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcber.19901230307 https://onlinelibrary.wiley.com/doi/pdf/10.1002/cber.19901230307 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Chemische Berichte volume 123, issue 3, page 455-458 ISSN 0009-2940 journal-article 1990 crwiley https://doi.org/10.1002/cber.19901230307 2024-05-03T11:16:11Z Contribution to the Chemistry of Boron, 201. ‐ Boration of Lactams and Ureas by an Amino‐Imino‐Borane Pyrrolidon reacts with ( tert ‐butylimino)(2,2,6,6‐tetramethylpiperidino)borane ( 1 ) to give the N ‐borated lactam 2 . Diketopiperazine behaves similarly. It is borated on both of its N atoms to form 3 . Urea and 1 give access to the O,N,N ′‐triborated isourea derivative 4 , which contains the structural unit of a ketiminoborane. The diborated carbodiimide 10 is ultimately obtained from 1 and thiourea via the triborated isothiourea derivative 9 . MNDO calculations have been used to estimate the relative thermodynamic stabilities of O/N borotropes of carbonic acid amides and lactams. They demonstrate that the O isomers gain in stability by increasing the size of N substituents. Article in Journal/Newspaper Carbonic acid Wiley Online Library Chemische Berichte 123 3 455 458 |
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English |
description |
Contribution to the Chemistry of Boron, 201. ‐ Boration of Lactams and Ureas by an Amino‐Imino‐Borane Pyrrolidon reacts with ( tert ‐butylimino)(2,2,6,6‐tetramethylpiperidino)borane ( 1 ) to give the N ‐borated lactam 2 . Diketopiperazine behaves similarly. It is borated on both of its N atoms to form 3 . Urea and 1 give access to the O,N,N ′‐triborated isourea derivative 4 , which contains the structural unit of a ketiminoborane. The diborated carbodiimide 10 is ultimately obtained from 1 and thiourea via the triborated isothiourea derivative 9 . MNDO calculations have been used to estimate the relative thermodynamic stabilities of O/N borotropes of carbonic acid amides and lactams. They demonstrate that the O isomers gain in stability by increasing the size of N substituents. |
format |
Article in Journal/Newspaper |
author |
Geisberger, Gilbert Neukirchinger, Katharina Nöth, Heinrich |
spellingShingle |
Geisberger, Gilbert Neukirchinger, Katharina Nöth, Heinrich Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran |
author_facet |
Geisberger, Gilbert Neukirchinger, Katharina Nöth, Heinrich |
author_sort |
Geisberger, Gilbert |
title |
Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran |
title_short |
Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran |
title_full |
Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran |
title_fullStr |
Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran |
title_full_unstemmed |
Die Borierung von Lactamen und Harnstoffen mit einem Amino‐imino‐boran |
title_sort |
die borierung von lactamen und harnstoffen mit einem amino‐imino‐boran |
publisher |
Wiley |
publishDate |
1990 |
url |
http://dx.doi.org/10.1002/cber.19901230307 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcber.19901230307 https://onlinelibrary.wiley.com/doi/pdf/10.1002/cber.19901230307 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Chemische Berichte volume 123, issue 3, page 455-458 ISSN 0009-2940 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/cber.19901230307 |
container_title |
Chemische Berichte |
container_volume |
123 |
container_issue |
3 |
container_start_page |
455 |
op_container_end_page |
458 |
_version_ |
1800749968417357824 |