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By Gould R.F. (ed.)

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1975,45, 686. 3~ The formation of (41 ;R = H) from the action of base on the salt (42) supports a mechanism via the intermediate ylides (43). The crystalline cyclic acyloxy- or amido-phosphoranes (45) were obtained in high yield from the cyclic phosphonite (44)and acrylic acid or acrylamide respectively under mild c ~ n d i t i o n s . 37cis-Cyclohexane- h ~CL, + CEICI, Wil 35 36 37 A. Turcant and M. Le Come, Tetrahedron Letters, 1976, 1277. T. Saegusa, S. Kubayashi, and Y . S. Chem. ,1976,443.

R. 46On the basis of its 31Pchemical shift in DMF solution, (108)was formulatedss as the free six-co-ordinate acid (110), but it seems probable that DMF is 65 F. Ramirez, J. F. Marecek, I. Ugi, P. Lemmen, and D. Marquarding, Phosphorus, 1975, 5, 73. M. F. Pommeret-Chasle, A. Leduc, and M. Hassairi, Tetrahedron, 1975,31,2775. 66 J. Gloede and H. Gross, Tetrahedron Letters, 1976, 917. 64 Quinquecovalent Phosphorus Compoiinds 47 (108) sufficiently basic to give a salt corresponding to (109) in solution.

Borisova, and I. M. Shermergorn,J . Gen. Chem. ), 1975,45,929 e2 K. -D. Roth, K. Einhellig, and L. Hatzelmann, Chem. , 1975, 108, 2737. 63 J. Albanbauer, K. Burger, E. Burgis, D. Marquarding, L. Schabl, and I. Ugi, Annalen, 1976,36. ~~ That from (101;R = OMe) probably had the relationship of methoxy to ring junction shown in (102);it slowly isomerized in solution at 40 "C to a 60:40 mixture with the isomer (103). The corresponding isomerizations were rapid in the case of the chloro- and dimethylamino-analogues.

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