Synthesis of 2-silaoxane via 1,3- photocycloaddition
✍ Scribed by Suhail Bahu; Steven A. Fleming; Brad Nilsson; Tim Turner
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2001
- Tongue
- English
- Weight
- 42 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0022-152X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Irradiation of an aryl group with a silyl tethered alkene yields a tetracyclic 2‐silaoxane with high regiose‐lectivity. The multicyclic structure has been further modified to give an unstable tricyclic diol. Photocycloaddition between cyclopentene and phenylcyclopropane gave a single major cycloadduct without cyclopropyl ring opening, indicating that the putative radical intermediate involved in cycloaddition apparently has a very short lifetime if it exists at all.
📜 SIMILAR VOLUMES
## Abstract On irradiation, in the presence of 2,3‐dimethylbuta‐1,3‐diene, naphthalen‐2‐ones **1** are quantitatively and regioselectively converted to mixtures of diastereoisomeric cyclobutane adducts **3** and **4**, whereas, under these conditions, 3‐(alk‐1‐ynyl)cyclohex‐2‐enones **5** give only
## Abstract 1,2,3‐Triarylpyrroles 7 have been synthesized by sequential lithiation and alkylation of 1‐benzylbenzo‐triazoles 1 with 2‐bromoacetaldehyde diethyl acetal (2) and __N__‐benzylideneaniline (4), followed by treatment with formic acid in ethanol.
## Abstract The newly synthesized 2‐(alk‐3‐en‐1‐ynyl)cyclohex‐2‐enones **4** undergo photodimerization (chemo‐ and regio‐)selectively at the exocyclic CC bond to give diastereoisomeric mixtures of 1,2‐dialkynyl‐1,2‐dimethylcyclobutanes. On irradiation of **4** in the presence of 2‐chloroacrylonitr