Organic Synthesis Utilizing the Transformation of Thioacetals into Titanium-carbene Complexes.
-
- TAKEDA Takeshi
- Department of Applied Chemistry, Tokyo University of Agriculture and Technology
-
- FUJIWARA Tooru
- Department of Applied Chemistry, Tokyo University of Agriculture and Technology
Bibliographic Information
- Other Title
-
- チオアセタールのチタン‐カルベン錯体への変換を利用する新しい有機合成
- チオアセタール ノ チタン カルベン サクタイ エ ノ ヘンカン オ リヨウ
Search this article
Abstract
Recently we found that various titanium-carbene complexes were produced by the desulfurization of thioacetals with the low-valent titanium species Cp2Ti [P (OEO)3] 2. This article deals with their application to organic synthesis including some guiding conceptions of the study. Desulfurization of thioacetals prepared from α, β-unsaturated aldehydes or 1, 3-bis (phenylthio) propene derivatives in the presence of 1-olefins afforded alkenylcyclopropanes. The intermediates of this reaction, vinylcarbene complexes, reacted with carbonyl compounds to afford the Wittig-like olefination products in good yields. The similar carbonyl olefination using various types of thioacetals and orththioformates with carbonyl compounds including carboxylic acid derivatives also produced a variety of olefins. Furthermore the alkylidenetitanocenes formed from saturated thioacetals reacted with organic molecules having a carbon-carbon multiple bond. When they were treated with alkynes, conjugated dienes were produced with high stereoselectivity. The reaction with allyltrialkylsilanes afforded (Z) -γ-substituted allylsilanes via the formation of titanacyclobutane intermediates. We also found the first [2+1] carbenoid insertion reaction of titanium-carbene complexes with trialkylsilanes and related group 14 organometallics.
Journal
-
- Journal of Synthetic Organic Chemistry, Japan
-
Journal of Synthetic Organic Chemistry, Japan 56 (12), 1048-1057, 1998
The Society of Synthetic Organic Chemistry, Japan
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001205278423552
-
- NII Article ID
- 10009344700
-
- NII Book ID
- AN0024521X
-
- COI
- 1:CAS:528:DyaK1cXotVOjs74%3D
-
- ISSN
- 18836526
- 00379980
-
- NDL BIB ID
- 4618287
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed