K. Heusler
Ciba Specialty Chemicals
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Featured researches published by K. Heusler.
Cellular and Molecular Life Sciences | 1962
K. Heusler; J. Kalvoda; Ch. Meystre; H. Ueberwasser; P. Wieland; G. Anner; A. Wettstein
The new methods for the production of 19-norsteroids described involve the conversion of 5α-halogen-6β-hydroxy-steroids into the corresponding 5α-halogen-6β:19-ethers either with lead tetraacetate or by the hypoiodite reaction8,10. The 6β:19-oxygen bridge is then opened reductively either directly or after oxidation of the 6β:19-ethers to lactones or preferably after introduction of a Δ4,6-3-oxo grouping. Acylolytic cleavage of the Δ4-3-oxo-6β:19-ethers followed by alkaline hydrolysis gives Δ4,6-3-oxo-19-hydroxy-steroids. The 19-hydroxycompounds formed are easily converted into 19-norsteroids by known methods.
Helvetica Chimica Acta | 1962
Ch. Meystre; K. Heusler; J. Kalvoda; P. Wieland; G. Anner; A. Wettstein
Helvetica Chimica Acta | 1963
J. Kalvoda; K. Heusler; H. Ueberwasser; G. Anner; A. Wettstein
Helvetica Chimica Acta | 1963
H. Ueberwasser; K. Heusler; J. Kalvoda; Ch. Meystre; P. Wieland; G. Anner; A. Wettstein
Helvetica Chimica Acta | 1957
J. Schmidlin; G. Anner; Jean-Rene Billeter; K. Heusler; H. Ueberwasser; P. Wieland; A. Wettstein
Helvetica Chimica Acta | 1964
Daniel Hauser; K. Heusler; J. Kalvoda; K. Schaffner; O. Jeger
Helvetica Chimica Acta | 1961
J. Kalvoda; G. Anner; D. Arigoni; K. Heusler; H. Immer; O. Jeger; M. Lj. Mihailović; K. Schaffner; A. Wettstein
Helvetica Chimica Acta | 1961
K. Heusler; J. Kalvoda; Ch. Meystre; P. Wieland; G. Anner; A. Wettstein; G. Cainelli; D. Arigoni; O. Jeger
Helvetica Chimica Acta | 1959
K. Heusler; J. Kebrle; Charles Meystre; H. Ueberwasser; P. Wieland; G. Anner; A. Wettstein
Helvetica Chimica Acta | 1963
K. Heusler; J. Kalvoda; G. Anner; A. Wettstein