𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The Stereochemistry of Rings A and B in 6-substituted Δ4-3-ketosteroids. A study of H1 allylic spin-spin coupling in rigid systems.

✍ Scribed by D.J. Collins; J.J. Hobbs; S. Sternhell


Publisher
Elsevier Science
Year
1963
Tongue
French
Weight
332 KB
Volume
4
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis


JXE endocrinological importance of a number of natural' and n syntheticL 6-substituted steroid hormones makes their stereochemistry of special interest, We have prepared a number of 6-substituted-A4-cholestene-3-ones and examined their NkR spectra to determine whether a general correlation could be made between the configuration (and conformation) at the &position and the character of the NXR signal attributed to the vinylic proton at C4.


📜 SIMILAR VOLUMES


Vitamin B-6 model reactions. Part VI-a H
✍ James R. Fischer; Edwin H. Abbott 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 222 KB

Four-bond protoeproton spin coupling constants were measured between the azomethine proton and the glycine CH protons of some coordinated glycine Schiff bases where the parent aldehyde is aromatic. Such systems are models for vitamin B, enzyme substrate complexes. It is demonstrated that the couplin

Proton magnetic resonance studies of com
✍ Trevor A. Crabb; Jacqueline S. Mitchell 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 284 KB

## Abstract __cis__(4‐H,11b‐H)‐4‐Aryl‐1,6,7,11b‐tetrahydro‐2__H__,4__H__‐[1,3]oxazino [4,3‐__a__]isoquinoline and the related thiazino compound preferentially adopt in solution the O (or S) inside __cis__‐conformation in contrast to __cis__(1‐H,4a‐H)‐1‐arylperhydropyrido[1,2‐__c__][1,3]oxazine whic

A combined NMR and electron spin resonan
✍ Alfonso Grassi; Claudio Pellecchia; Leone Oliva; Franco Laschi 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 443 KB

The reaction of (C,(CH,),)Ti(CHZC6H,), with B(C,F,), in chlorobenzene at 25 "C produces a mixture of [(C,(CH,)5 )Ti(CH,C,H,),] + [B(CH2C6H5)(C6F,),] -(1) and Ti(II1) complexes which have been characterized by NMR and electron spin resonance (ESR) spectroscopy, respectively. Spectroscopic data combin