Brian has forwards an outline of the epistle that was published many years ago by C H Welch.

A 1:1,2 SALUTATION

B 1:3-26 FELLOWSHIP IN GOSPEL from FIRST DAY

C 1:27-2:5 STAND FAST. MIND OF CHRIST.

D 2:6-11 The SEVENFOLD HUMILIATION of CHRIST. EXAMPLE.

E 2:12-17 EXHORTATION to WORK OUT YOUR SALVATION

F 2:17-30 EXAMPLE of PAUL, TIMOTHY and EPAPHRODITUS

E’ 3:1-3 EXHORTATION to BEWARE

D’ 3:4-19 The SEVENFOLD LOSS of PAUL. EXAMPLE

C’ 3:20-4:10 STAND FAST. BODY of GLORY.

B’ 4:11-20 FELLOWSHIP in BEGINNING of GOSPEL

A’ 4:21-23 SALUTATION CAESAR’S HOUSEHOLD.

Note: I found a similar proposal by A. Boyd Luter and Michelle V. Lee (1995). Philippians as Chiasmus: Key to the Structure, Unity and Theme Questions. New Testament Studies, 41, pp 89-101 doi:10.1017/S0028688500022967.

A CHIASTIC OUTLINE OF PHILIPPIANS

(1.1-2) Opening Greetings: Previewing ‘Partnership’ Theme, Emphasizing Servant-Leadership.

A. (1.3-11) Prologue: ‘Partnership in the Gospel’ Theme Introduced with Prayerful Gratitude.

B. (1.12-26) ComfortIExample: Paul’s Safety and Right Think- ing in the Midst of a Difficult ‘Guarded’ Situation.

C. (1.27-2.4) Challenge: Stand Fast and Be United, Ful- filling Paul’s Joy!

D. (2.5-16) Example /Action: Christ’s Example of Humility and Suffering before Glory, then Related Behavioural Instructions.

E. (2.17-3.1a) Midpoint: Caring Models of Gospel Partnership, Two of Which Are Sent to Help Immediately.

D’. (3.1b-21) Example IAction: Paul’s Example of Humbling and Suffering before ‘Upward Call’/ Transformation, then Instructions.

C (4.1-5) Challenge: Stand Fast and Accentuate Existing Joy by the Reconciliation of Two Past Gospel Partners!

B’. (4.6-9) ComfortIExample: The Philippians’ ‘Guarded’ Peace of Mind and Right Thinking in the Midst of an Anxious Situation.

A’. (4.10-20) Epilogue: Partnership from the Past Renewed, with Expressed Gratitude.

(4.21-3) Closing Greetings: Reviewing Partnership Theme, Emphasizing Oneness of the Saints.

Note: I also came across deep skepticism about large scale chiasmus in Stanley E. Porter and Jeffrey T. Reed (1998). Philippians as a Macro-Chiasm and its Exegetical Significance. New Testament Studies, 44, pp 213-231 doi:10.1017/ S0028688500016489