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Synthesis of 3β-hydroxy-Δ5-steroids by sodium borohydride reduction of dienol trimethylsilyl ether derivatives of 3-oxo-Δ4-steroids

✍ Scribed by Leif Aringer; Peter Eneroth

Book ID
118977648
Publisher
Elsevier Science
Year
1971
Tongue
English
Weight
496 KB
Volume
18
Category
Article
ISSN
0039-128X

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📜 SIMILAR VOLUMES

A novel fragmentation of trimethylsilyl
A novel fragmentation of trimethylsilyl ethers of 3β-hydroxy-Δ5-steroids
✍ Ingemar Björkhem; Jan-Årke Gustafsson; Jan Sjövall 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 296 KB

## Abstract An ion formed by loss of 56 mass units from the molecular ion is often seen in mass spectra of trimethylsilyl ethers of C~19~ and C~21~ steroids having a 3β‐hydroxy‐Δ^5^ structure and an oxo group at C‐17 or C‐20. The nature of this fragment was investigated by the use of perdeuteriotri

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✍ C. J. W. Brooks; D. J. Harvey; B. S. Middleditch; P. Vouros 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 894 KB

## Abstract The mass spectra (20 eV electron energy) of a wide range of %Δ^5^‐3β‐hydroxy C~19~ steroid TMS ethers have been examined with the aid of high‐resolution mass measurements, together with deuterium and oxygen‐18 labelling data. The validity of many previously proposed fragmentation modes

Mass spectra of the trimethylsilyl ether
Mass spectra of the trimethylsilyl ethers of some 3β-hydroxy-Δ5-C21 steroids
✍ D. J. Harvey; B. S. Middleditch; C. J. W. Brooks 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 685 KB

The mass spectra of the trimethylsilyl derivatives of 22 3P-hydroxy-A5-pregnenes have been examined with the aid of deuterium labelling and high resolution mass measurements. The influence of additional hydroxy and keto substituents on the characteristic fragment ions is discussed and fragmentation